Favorite this☆ National dirt track championship : official program Description: National dirt track championship : official program : 100 miles auto race, Detroit, October 14, 1923 / Michigan Speedway Association. Title from cover. Includes entrants and officials. Details Resource ID: na050700 Creator: Michigan Speedway Association Subject: Automobile racing--Michigan--Detroit Racetracks (Automobile racing)--Michigan--Detroit Michigan State Fair Programs Date Issued: 1923-10-14 Format: 1 program : 8.5 in. Member of: National Automotive History Collection Filing Location: Vertical File, Races and racing--Michigan State Fairgrounds Rights: Physical rights are retained by DPL. Copyright is retained in accordance with U.S. copyright laws.