Nature at work 

 - New York :  Cambridge University Press,  1978. 
 - 84p.;  Col.ill.;  22cm 
<br/><br/><label>ISBN: </label>0-521-22390-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology
<br/><br/><label>Dewey Class. No.: </label>570  / NAT