"Grewal, N.S." <br/><br/>
Biogas technology. 

 - Ludhiana  Punjab Agricultural University.  1985 
 - 26 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biogas Punjab
<br/><br/><label>Dewey Class. No.: </label>PB 333.7938 Gre