Food production and consumption :  the efficiency of human food chains and nutrient cycles / 
edited by A. N. Duckham, J. G. W. Jones and E. H. Roberts 
 - Amsterdam :  North-Holland,  1976 
 - xx, 541 p. :  ill.  ;  24 cm. 
<br/><br/><label>ISBN: </label>0444110429 
<br/><br/><label>LCCN: </label>75-037888 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nutrition<br/>Foodchains (Ecology)<br/>Biogeochemical cycles<br/>Agriculture