The wilderness world of the Grand Canyon : "leave it as it is" /

Bibliographic Details
Main Author:	Sutton, Ann
Other Authors:	Sutton, Myron
Format:	Book
Language:	English
Published:	Philadelphia : Lippincott, 1971
Edition:	1st ed.
Subjects:	Natural history > Arizona > Grand Canyon Region. Grand Canyon National Park (Ariz.)

Description
Physical Description:	xii, 241 pages : illustrations, map (on lining papers) ; 24 cm.
Bibliography:	Bibliography: pages [225]-229.