FOOD and Agriculture Organization <br/><br/>
Biogas: what it is, how it is made, how to use it 

 - Rome  Food and Agriculture Organization of the United Nations  1984 
 - 47p. 
 - FAO Economic and Social Development Series No.;3/31 .
<br/><br/><label>ISBN: </label>9251012903 
<br/><br/><label>Dewey Class. No.: </label>665.73  / FOO