Purdue University. Engineering Experiment Station, American Railway Association, Gray, W. E., & Messersmith, C. W. (1929). Tests of freight car draft gears: Reprint of Report of draft gear tests for the American Railway Association. Purdue university.
Chicago Style (17th ed.) CitationPurdue University. Engineering Experiment Station, American Railway Association, William Enoch Gray, and Charles William Messersmith. Tests of Freight Car Draft Gears: Reprint of Report of Draft Gear Tests for the American Railway Association. Lafayette, Ind.: Purdue university, 1929.
MLA (9th ed.) CitationPurdue University. Engineering Experiment Station, et al. Tests of Freight Car Draft Gears: Reprint of Report of Draft Gear Tests for the American Railway Association. Purdue university, 1929.