Vogel, Robert M.
Tunnel Engineering : A Museum Treatment [recurso electrónico] / Robert M. Vogel - Project Gutenberg, 2012 - Project Gutenberg 39785 .
Public domain in the USA.
Text
Tunneling -- History
TA
Tunnel Engineering : A Museum Treatment [recurso electrónico] / Robert M. Vogel - Project Gutenberg, 2012 - Project Gutenberg 39785 .
Public domain in the USA.
Text
Tunneling -- History
TA