Edwards, Roger Yorke, 1924-

The mountain barrier [by] R. Yorke Edwards. - [Toronto, N.S.L. Natural Science of Canada Ltd., 1970] - 160 p. illus. (part col.), col. maps. 25 x 27 cm. - The Illustrated natural history of Canada .

Bibliography: p. 153-155.

LCCN: 73109049 //r82

Nat. Bib. No.: C***

Subjects--Topical Terms:
Natural history--Canada.
Natural history--Canadian Rockies (B.C. and Alta.)

LC Class. No.: QH106 / .E38

Dewey Class. No.: 500.9711