Land and leisure :  concepts and methods inoutdoor recreation / 
edited by Carlton S. Van Doren. 
 - 2nd ed. 
 - London :  Methuen and Co. Ltd.,  1979. 
 - 317 p. ;  24 cm. 
<br/><br/><label>ISBN: </label>041671840X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Outdoor recreation--United States.