Proposal for farming system -oriented crop research of wawi highland agricultural research   station in northern land/ 
Schubert Bernd 
 -  Technical university of  berlin  1986 
 - xxxiii, 323pg ill  Hbk 
<br/><br/><label>ISBN: </label>3924333637 
<br/><br/><label>LC Class. No.: </label>S 439. C4 1986