Productivity of world ecosystems:  proceedings of a symposium presented August 31-September 1, 1972, at the V General Assembly of the Special Committee for the International Biological Program, Seattle, Washington 

 - Washington, D.C.:  National Academy of Sciences,  1975. 
 - 166p:   ill.;   28cm 
<br/><br/> Symposium sponsored by U.S. National Committee for the International Biological Program, Division of Biological Sciences, Assembly of Life Sciences, National Research Council. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0309023173 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biological productivity--Congresses.