Hoffman, John Floyd, 1941- <br/><br/>
Grand Canyon visual / 
Hoffman, John Floyd, 1941- 
 - San Diego :  Scenic Visuals Publications,   1987 
 - 79p 
<br/><br/><label>ISBN: </label>411040018007 
<br/><br/><label>Dewey Class. No.: </label>917.9132  / HOF