Wallace, Robert <br/><br/>
Grand canyon 
Robert Wallace; illustrations by Ernst Haas 
 - Amsterdam  Time-Life Books  1972 
 - 184p.  ill.  26cm  map 
 - World's wild places. Time life books .
<br/><br/> Includes index 
<br/><br/>Bibliography: p.180 
<br/><br/><label>ISBN: </label>705400913 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geography--Encyclopedias<br/>Natural history--Encyclopedias<br/>Encyclopedias and dictionaries
<br/><br/><label>Dewey Class. No.: </label>910.3  / WOR