| IA | ALDEN | STONERS GARAGE | N/A | DD.57 |
| IA | ALGONA | J & L MOTORS | N/A | DD.57 |
| IA | ALGONA | CENTRAL MOTORS | 104 N JONES ST | 55 LIST |
| IA | AMBER | ZIMMERMAN MOTOR SALES | N/A | DD55 |
| IA | AMES | DEPENDABLE MOTORS | 319 LINCOLN WAY | DD.57 |
| IA | ANTHON | WILSON MOTOR CO. | N/A | DD.57 |
| IA | APLINGTON | FECHT MOTOR CO. | N/A | DD.57 |
| IA | ATLANTIC | HENNINGSON MOTOR CO. | 400 WALNUT | DD.57 |
| IA | AURELIA | VOSS MOTOR SERVICE | N/A | DD.57 |
| IA | BAYARD | A.W. MCGEE GARAGE | N/A | DD55 |
| IA | BAYARD | McCLELLAN GARAGE | N/A | DD.57 |
| IA | BEDFORD | WILSON IMPL. & AUTO | 406 MADISON | DD55 |
| IA | BLAIRSBERG | McCOMB MOTOR CO. | N/A | DD.57 |
| IA | BONAPARTE | LAZENBY MOTOR CO. | N/A | DD.57 |
| IA | BOONE | CARSWELL MOTORS | 702 ALLEN ST | DD.57 |
| IA | BUFFALO CENTER | JENSVOLD INC. | N/A | DD.57 |
| IA | BURLINGTON | GARD & GOWER MOTORS | 8800 S MAIN ST | DD.57 |
| IA | CEDAR RAPIDS | SCHAMBERGER MOTOR INC. | 717 3RD AVE SE | DD.57 |
| IA | CEDAR RAPIDS | WAGNER MOTOR CO | N/A | N/A |
| IA | CEDAR RAPIDS | BAXTER MOTORS | N/A | 48 RACE PROGRAM |
| IA | CEDAR RAPIDS | SWAB MOTOR CO | N/A | DR 1/47 |
| IA | CENTERVILLE | NORRIS MOTORS | 423 NORTH MAIN | DA ND 86 |
| IA | CHARLES CITY | WOOD MOTOR CO | N/A | 54 CAL |
| IA | CHARLES CITY | RICKEY'S | 800 E CLARK ST | 55 LIST |
| IA | CLARINDA | SHORE & CRAWFORD MOTOR | 222 N 6TH ST | DD.57 |
| IA | CLARINDA | ROPE | N/A | WEB MB |
| IA | CLARION | LOYD'S GARAGE | 213 S MAIN ST | DD.57 |
| IA | CLEGHORN | GOODRICH & CARRIS OIL CO. | N/A | DD.57 |
| IA | CLINTON | MACHAEL OIL CO. INC. | 117 sS 2ND | DD.DEC.57 DR. |
| IA | CLUTIER | HARTWIG AUTO CO. | N/A | DD.57 |
| IA | COLFAX | FRANK ROSENBAUM & SONS | N/A | DD.57 |
| IA | COLUMBUS JNCT. | HULL'S GARAGE | N/A | DD.57 |
| IA | CORYDON | STOFFER MOTOR SALES | N/A | DD.57 |
| IA | COUNCIL BLUFFS | KNUDSEN AUTO SERVICE | 149 WEST BROADWAY | DD.57 |
| IA | DAVENPORT | HORST & ZIMMERMAN MTR'S | 926 W 3rd | DD.57 |
| IA | DAVENPORT | LYTLE MOTOR CO. | 218 RIPLEY ST. | VOL 13 #2 |
| IA | DAVENPORT | SCHLERBROCK MOTORS | N/A | N/A |
| IA | DECORAH | TESLOW SALES & SERVICE | N/A | DD.57 |
| IA | DENISON | HAMANN & JENSEN MOTORS | 22 S 14TH | 55 LIST |
| IA | DES MOINES | BRADY MOTORS | 1208 LOCUST ST | DD.APR.57 DR |
| IA | DES MOINES | HUMMEL BROTHERS | 2822 BEAVER AVE | DD.57 |
| IA | DUBUQUE | FELDMAN MOTORS | 455 CENTRAL AVE | WEB CARDS |
| IA | DUBUQUE | GUARANTEED MOTORS | 1209 MAIN ST | 55 LIST |
| IA | DURANT | SCHUKAR | N/A | VOL 13 #2 |
| IA | DURANT | COLE MOTOR CO | CLAY ST | 55 LIST |
| IA | DYERSVILLE | HOGAN MOTOR CO | 100 SOUTH ROCKVILLE | PC 58 |
| IA | EAGLE GROVE | DAHLBERG GARAGE | 315 W BROADWAY | DD.57 |
| IA | EARLING | WILWERDING GARAGE | N/A | DD55 |
| IA | EDGEWOOD | ASHLINE MOTORS | N/A | DD.57 |
| IA | ELMA | ART GANSEN GARAGE | N/A | DD55 |
| IA | ESTERVILLE | DONOVAN MOTORS | N/A | DD.57 |
| IA | FORT DODGE | SHIMKAT MOTOR CO. | 1225 2ND AVE S | DD.57 |
| IA | FORT MADISON | DALEY MOTOR SERVICE | 1014 AVENUE H | DD.57 |
| IA | GAZA | WALL & TJOSSEM MOTOR CO. | N/A | DD.57 |
| IA | GEORGE | GEORGE MOTOR CO. | N/A | DD55 |
| IA | GILMORE CITY | W.H. GOODRICH AUTO | N/A | DD.57 |
| IA | GLADBROOK | MOHR'S GARAGE | N/A | DD.57 |
| IA | HAMPTON | ALLEN'S ONE STOP SERVICE | 11 FEDERAL NORTH | DD.57 |
| IA | HAWKEYE | TRIPLE L GARAGE | N/A | DD.57 |
| IA | HOLSTIEN | THARP GARAGE | N/A | DD.57 |
| IA | HOSPERS | VANDERWILT MOTOR CO. | N/A | DD55 |
| IA | IOWA CITY | FRESWICK MOTOR CO. | 840 S SUMMITT | DD.57 |
| IA | KALONA | KALONA MOTOR & IMPL. | HWY 22 | DD.57 |
| IA | KEOKUK | TIGUE MOTORS | 721 MAIN ST | DD.57 |
| IA | KEOTA | BANDY'S GARAGE | N/A | DD.57 |
| IA | KINGSLEY | R.W. WOOD MOTOR CO. | N/A | DD.57 |
| IA | KNOXVILLE | FAST'S MOTOR CO. | N/A | DD55 |
| IA | LEMARS | MCKEE MOTOR CO. | N/A | DD55 |
| IA | LOVILLA | SOFRANKO GARAGE | N/A | DD.57 |
| IA | MARSHALTOWN | GEORGE THINGER MOTORS | N/A | DD.57 |
| IA | MASON CITY | BILL HAWLEY INC | 6th & S WASHINTON | DD.OCT.58 DR. |
| IA | McGREGOR | N/A | N/A | PC |
| IA | MILO | HERB WALK MOTORS | N/A | DD.57 |
| IA | MINBURN | RANEY MOTOR SALES | N/A | DD.57 |
| IA | MISSOURI VALLEY | HABICHT GARAGE | 104 S 6TH | DD.57 |
| IA | MUSCATINE | LEU'S GARAGE | 810 E SECOND | 55 LIST |
| IA | MOUNT AYR | MAIN MOTOR CO. | N/A | DD.57 |
| IA | NEVADA | WALKER MOTOR SALES | 1209 5th ST | WEB RP PC |
| IA | ONAWA | DELANTY MOTORS | N/A | DD55 |
| IA | ONAWA | ONAWA TRACTOR & SUPPLY | N/A | DD.57 |
| IA | OSAGE | OLSON MOTOR CO. | 1401 E MAIN ST | DD.57 |
| IA | OTTUMWA | GLOVER MOTOR CO. | 613 RICHMOND AVE | DD.OCT.58 DR. |
| IA | READLYN | MOELLER AUTO MART | N/A | DD.57 |
| IA | ROCKWELL CITY | RODEWELL IMPLE | 124 COURT ST | 55 LIST |
| IA | SANBORN | GETTING MOTORS | N/A | DD.57 |
| IA | SHENANDOAH | WILLIAMS BROTHERS | 204 MAPLE | DD.57 |
| IA | SIBLEY | UNITED FARM SERVICE | N/A | DD.57 |
| IA | SIGNOURNEY | CHAPMEN BROS | N/A | WEB PENCIL |
| IA | SIOUX CITY | WILSON MOTOR CO. | 909 PIERCE ST | DD.57 |
| IA | SIOUX CITY | ELKIN MOTOR CO | N/A | DR 7/47 |
| IA | SOUTH ENGLISH | WALK MOTOR & IMPL. | N/A | DD55 |
| IA | SPENCER | ANDERSON MOTOR CO | N/A | WEB |
| IA | SPENCER | PARKS MOTORS & IMPLEMENTS INC | 1801 GRAND AVE N | DR 8/50 |
| IA | SPRINGVILLE | STAMBAUGH MOTORS | N/A | DD.57 |
| IA | STORM LAKE | SCHULKE MOTOR CO. | 211 W 5TH | DD.57 |
| IA | WATERLOO | MARTINEAU MOTORS | N/A | DD.57 |
| IA | WATERLOO | DAHL MOTORS WATERLOO INC | 512 JEFFERSON ST | PP 53-56 |
| IA | WAUKEE | WAUKEE MOTORS | N/A | DD.57 |
| IA | WAUKON | MOTOR SALES & SERVICE | N/A | DD.57 |
| IA | WELLSBERG | OKONES IMPL. CO. | N/A | DD55 |
| IA | WINFIELD | SCOTT EQUIPMENT CO. | LOCUST ST | DD55 |
| IA | YALE | DEARDORFF MOTOR & IMPL. | N/A | DD.57 |