Tubular plastic bio-digester :    design, installation and managemen t 

 - Harare :    FARMESA,    1996 
 - 29p. :    ill. ;    24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Gobar gas
<br/><br/><label>Dewey Class. No.: </label>AF P 665.776 TUB