Annett, F.A.
Elevators : electric and electrohydraulic elevators, escalators, moving sidewalks, and ramps - 3rd ed. - New York McGraw-Hill 1960 - xi, 388p. : ill.
621.877 / A6
Elevators : electric and electrohydraulic elevators, escalators, moving sidewalks, and ramps - 3rd ed. - New York McGraw-Hill 1960 - xi, 388p. : ill.
621.877 / A6