Roa, Michael L. <br/><br/>
Enviromental science activities kit / 
by Michael L. Roa. 
 - San Francisco :  Jossey-Bass,  1993. 
 - xx, 332 p. : ;  28 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental Education--Activity Programs.<br/>Environmental Science--Problems, exercises etc.