Collis, Margaret <br/><br/>
Using the environment 3 tackling problems part1 : A Unit for Teachers 

 - London :  Macdonald educational pub,  1974. 
 - 88p.;  Col.ill.;  23cm 
<br/><br/><label>ISBN: </label>0 356 04356 8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Enviromental Problems<br/>Science
<br/><br/><label>Dewey Class. No.: </label>507  / COL