The operation of mechanical tunnel-boring machines in Canada
By: [by] T. W. Verity.
Series: Canada. Dept. of Energy, Mines and Resources. Mines Branch. Information circular 256
Publisher: Dept. of Energy, Mines and Resources, Mines Branch
Published: 1970
Place of publication: Ottawa
Language: eng
Number of pages: 126
Subjects: Tunneling -- Equipment and supplies.; Boring machinery.
Notes: Cover title.
Summary in French.