Annett, F. A. (1960). Elevators: Electric and electrohydraulic elevators, escalators, moving sidewalks and ramps. McGraw-Hill.
Tohutoru Kātū Chicago (17th ed.)Annett, F. A. Elevators: Electric and Electrohydraulic Elevators, Escalators, Moving Sidewalks and Ramps. Nueva York: McGraw-Hill, 1960.
Tohutoro MLA (9th ed.)Annett, F. A. Elevators: Electric and Electrohydraulic Elevators, Escalators, Moving Sidewalks and Ramps. McGraw-Hill, 1960.
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