Eco-physiological foundation of ecosystems productivity in arid zone.  International Symposium, USSR, June, 7-19, 1972. 

 - Leningrad,  Pub. House "Nauka," Leningrad Branch,  1972. 
 - 231 p.  illus.  27 cm. 
<br/><br/> At head of title: USSR Academy of Sciences. Soviet National Committee for International Biological Programme. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biological productivity--Congresses.<br/>Desert ecology--Congresses.<br/>Plant physiology--Congresses.
<br/><br/><label>LC Class. No.: </label>QH541.3  / .E25 1972 
<br/><br/><label>Dewey Class. No.: </label>574.5/265