survey of elevator interlocks and an analysis of elevator accident statistics
By: by C.E. Oakes, Electrical Engineer [and] J.A. Dickinson, Mechanical Engineer, Bureau of Standards. October 17, 1921 ...
Contributors: Dickinson, J. A.,
Series: [United States] Bureau of Standards. Technologic papers -- no. 202
Publisher: Govt. Print. Off.
Published: 1921
Place of publication: Washington
Subjects: Elevators
Other titles: Elevator interlock report.