Ford, Phyllis M. <br/><br/>
Principles and practices of outdoor/environmental education / 
Phyllis M. Ford 
 - New York :  John Wiley & Sons,  1981 
 - 348 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>0471047686 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Outdoor recreation--Study and teaching<br/>Outdoor education<br/>Environmental education