Atherton, W. H. Conveyors and cranes: Including continuous elevators, stackers, skip hoists, transporters and electric telphers. New York: Pitman Publishing.
Παραπομπή Chicago StyleAtherton, William H. Conveyors and Cranes: Including Continuous Elevators, Stackers, Skip Hoists, Transporters and Electric Telphers. New York: Pitman Publishing.
Παραπομπή MLAAtherton, William H. Conveyors and Cranes: Including Continuous Elevators, Stackers, Skip Hoists, Transporters and Electric Telphers. New York: Pitman Publishing.
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