Methods of study in soil eclogy 
edited by J. Phillipson 
 - Paris  Unesc  1970 
 - 303p.; 27cm.- 
 - Ecology and conxservation ; no. 2 .
<br/><br/> Proceedings of the Paris symposium organised by Unesco and the International Biological Programme  
<br/><br/><label>Dewey Class. No.: </label>581.5  / PHI