Knauer, Norbert  <br/><br/>
Ökologie und Landwirtschaft :   Situation, Konflikte, Lösungen / 
Norbert Knauer. 
 - Stuttgart :   Eugen Ulmer,   1993. 
 - 280 p. :  ill. 
<br/><br/><label>ISBN: </label>3800140942 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology <br/>Agricultural Ecology<br/>Agriculture