The maintenance of life  Nuffield biology text iii 
Nuffield Foundation 
 - London:  The Nuffield foundation,  1968 
 - 238p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology-Textbook, 'O' level
<br/><br/><label>Dewey Class. No.: </label>372.357  / NUB