TY  - BOOK
AU  - Mittal, K M  .
TI  - Biogas systems:Principles and applications / 
SN  - 81  224  0947  4
U1  - 621.47 
PY  - 1996///
CY  - New Delhi : 
PB  - New Age International Ltd , 
N1  - 20200-01 Scheme
ER  -