Hawkins, Donald E. <br/><br/>
The environmental classroom / 
by Donald E. Hawkins and Dennis A. Vinton. With the assistance of Carol B. Epstein 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  1973 
 - ix, 374 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographies 
<br/><br/><label>ISBN: </label>013283135X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational innovations--United States<br/>Environmental education--United States