Gravity unloading of carts and wagons : a century of experimentation.

MLA

Holley, I. B. Gravity Unloading of Carts and Wagons : a Century of Experimentation. Houghton, Mich.: Society for Industrial Archeology., 2002.

APA

Holley, I. B. (2002). Gravity unloading of carts and wagons : a century of experimentation. Houghton, Mich.: Society for Industrial Archeology.

Chicago

Holley, I. B. Gravity Unloading of Carts and Wagons : a Century of Experimentation. Houghton, Mich.: Society for Industrial Archeology., 2002.