Kirk, Ruth. <br/><br/>
Exploring Yellowstone / 
Photos. by Ruth and Louis Kirk. 
 - Seattle :  Published in cooperation with Yellowstone Library and Museum Association by the Univ. of Washington,  1972. 
 - 120 p. :  ill. 
<br/><br/><label>ISBN: </label>0295951885 (pbk.) 0295951745 
<br/><br/><label>LCCN: </label>78178702 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Yellowstone National Park.
<br/><br/><label>Dewey Class. No.: </label>917.87