Gerber, Siegfried E.,  <br/><br/>
Modern way of agriculture and its impact on environment / 
Siegfried E., Gerber 
 - Nakuru :  Technopress (K) Limited,  1990 
 - 63 pages :  illustrations ;  21 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earthworms<br/>Organic farming
<br/><br/><label>LC Class. No.: </label>SB998.E4 G47