Hall J A <br/><br/>
Environmental studies 

 - New York       Arco Publishing         1978 
 - 283p.  cm. 
 - Teacher's manual available .
<br/><br/><label>Standard No.: </label>45701 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology
<br/><br/><label>Dewey Class. No.: </label>G:5:f, L8