Ketchum, M. S., & Draffin, J. O. (1932). Strength of light I beams: A report of an investigation conducted by the Engineering Experiment Station, University of Illinois in coöperation with Jones and Laughlin Steel Corporation. University of Illinois.
Citace podle Chicago (17th ed.)Ketchum, Milo S., a Jasper Owen Draffin. Strength of Light I Beams: A Report of an Investigation Conducted by the Engineering Experiment Station, University of Illinois in Coöperation with Jones and Laughlin Steel Corporation. Urbana, Ill.: University of Illinois, 1932.
Citace podle MLA (8th ed.)Ketchum, Milo S., a Jasper Owen Draffin. Strength of Light I Beams: A Report of an Investigation Conducted by the Engineering Experiment Station, University of Illinois in Coöperation with Jones and Laughlin Steel Corporation. University of Illinois, 1932.