A safety code for elevators, dumbwaiters and escalators :
first revision; Rules for construction, inspection, maintenance and operation.

APA Citation

American Society of Mechanical Engineers. (1925). A safety code for elevators, dumbwaiters and escalators: first revision; Rules for construction, inspection, maintenance and operation. New York: Amer. Soc. of Mech. Engineers.

MLA Citation

American Society of Mechanical Engineers. A Safety Code for Elevators, Dumbwaiters And Escalators: First Revision; Rules for Construction, Inspection, Maintenance And Operation. New York: Amer. Soc. of Mech. Engineers, 1925.