Ketchum, M. S. (1924). Structural engineers' handbook: Data for the design and construction of steel bridges and buildings (3rd ed., enlarged, total issue, 33 thousand.). New York: McGraw-Hill Book Company.
Παραπομπή Chicago StyleKetchum, Milo S. Structural Engineers' Handbook: Data for the Design and Construction of Steel Bridges and Buildings. 3rd ed., enlarged, total issue, 33 thousand. New York: McGraw-Hill Book Company, 1924.
Παραπομπή MLAKetchum, Milo S. Structural Engineers' Handbook: Data for the Design and Construction of Steel Bridges and Buildings. 3rd ed., enlarged, total issue, 33 thousand. New York: McGraw-Hill Book Company, 1924.
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