- 1Robert M. Vogel
Elevator Systems of the Eiffel Tower 1889
1961; 40 S. : Ill.
Eiffelturm <Paris>; Aufzug <Fördermittel> - 2Robert M. Vogel
The engineering contributions of Wendel Bollman
1964; S. 79 - 103 : Ill.
Ingenieurbau - 3Robert M. Vogel
Tunnel Engineering : A museum treatment
1964; S. 203 - 239 : Ill.
Tunnelbau - 4Robert M. Vogel
Vertical transportation in old back bay, a museum case study : the acquisition of a small residential hydraulic elevator
Washington, D.C.: 1988; 41 S. : Ill.
Aufzug <Fördermittel>