National Highway Users Conference., & Gray, C. H. (1937). Highways and motor transportation, a bibliography (Cumulative edition, December 1, 1937.). Washington, D. C.: National highway users conference.
Chicago Style CitationNational Highway Users Conference., and Chester Harold Gray. Highways and Motor Transportation, a Bibliography. Cumulative edition, December 1, 1937. Washington, D. C.: National highway users conference, 1937.
MLA CitationNational Highway Users Conference., and Chester Harold Gray. Highways and Motor Transportation, a Bibliography. Cumulative edition, December 1, 1937. Washington, D. C.: National highway users conference, 1937.
Warning: These citations may not always be 100% accurate.