Walker, Richard J. <br/><br/>
Exploring photography / 
Richard J. Walker, Robert E. Walker. 
 - South Holland, Illinois :  Goodheart-Willcox Co., Inc. ,  1987. 
 - 200 p. 
<br/><br/><label>ISBN: </label>0-87006-651-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photography