Introduction of biogas technology in democratic Ye 

 - New York  United Nations USA         1986 
 - 134p. Bib p. 131-34  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gas Industry
<br/><br/><label>Dewey Class. No.: </label>X9(F558).463.N9, M6