Butcher, Devereux. <br/><br/>
Exploring our national parks and monuments / 
Devereux Butcher. 
 - 4th ed. 
 - Boston :  Houghton Mifflin,  c 1954. 
 - viii, 288 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>56  56 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural landscapes.
<br/><br/><label>Dewey Class. No.: </label>719.32 / B971e