Sharpe, Grant William. <br/><br/>
Interpreting the environment /    
Grant William Sharpe. 
 - New York :   John Wiley ,   1982. 
 - xiii, 694 p. :    ill. ;    24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural history --Study and teaching.------<br/>Nature study.--Study and teaching.------<br/>Park rangers.--Study and teaching.------