Introduction of biogas technology in democratic Ye 

 - New York   UN           1986 
 - 134p Bibliography: P 131-34  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Fuel Gas<br/>Industrial Economics
<br/><br/><label>Dewey Class. No.: </label>X9(F558).463.N9, M6/UN