Clark, Roger N. <br/><br/>
The recreation opportunity spectrum : a framework for planning, management, and research / 
Roger N. Clark and George H. Stankey 
 - Washingtion :  United States Government Printing Office,  1979 
 - 32 p. ;  28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Forest management<br/>Land use
<br/><br/><label>Dewey Class. No.: </label>634.92