On the frontier
Subtitle: photographs
By: by the Geological Survey of Canada = Frontières : photographies / par la Commission géologique duCanada / [edited by] R.G. Blackadar.
Contributors: Blackadar, R. G.; Geological Survey of Canada.
Publisher: Canadian Government Publishing Center
Published: 1982
Place of publication: Hull, Queb
Language: eng
Notes: Cover and spread title.

Introd. and captions in English and French.