Biotic diversity in agroecosystems :  papers from a symposium on agroecology and conservation issues in Tropical and temperate regions, University of Padova, Padova Italy, 26-29, September 1990. / 
edited by M.G. Paoletti and D. Pimentel. 
 - Amsterdam, The Netherlands :  Elsevier,  1992. 
 - 356 p :  ill. 
<br/><br/><label>ISBN: </label>0444893903 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sustainable agriculture.<br/>Agricultural ecology.<br/>Agricultural conservation.<br/>Soil conservation.