A blueprint for survival / 
by the editors of The Ecologist 
 - Harmondsworth :  Penguin Books,  1972 
 - xiv, 139 p. ;  19 cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>0140522956 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human ecology<br/>Environmental policy<br/>Conservation of natural resources