Nature in the round  a guide to environmental science 
edited by Nigel Calder 
 - New York :  Viking Press,  1974 
 - vii, 295 p. :  ill. ;  22 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0670504742 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology<br/>Conservation of natural resources