Ketchum, M. S. (1924). Structural engineers' handbook: Data for the design and construction of steel bridges and buildings (3rd ed.). McGraw-Hill.
Dyfyniad Arddull ChicagoKetchum, Milo S. Structural Engineers' Handbook: Data for the Design and Construction of Steel Bridges and Buildings. 3rd ed. New York: McGraw-Hill, 1924.
Dyfyniad MLAKetchum, Milo S. Structural Engineers' Handbook: Data for the Design and Construction of Steel Bridges and Buildings. 3rd ed. McGraw-Hill, 1924.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.