Biogas fertilizer system :  technical report on a training seminar in China 

 - Nairobi :  United Nations Environment Programme,  1981 
 - 86 p. 
 - UNEP reports and proceedings series ;  no. 2 .
 - United Nations.  Environment Programme.  UNEP reports and proceedings series ;  no. 2 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers and manures--China<br/>Biogas
<br/><br/><label>LC Class. No.: </label>HC79 E5  / U462 no.2