000
00273nam a2200121Ia 4500
008
191031s9999 xx 000 0 und d
100
_a
Mittal
245
0
_a
Biogas systems princples and application
260
_b
Newage
260
_c
1996
365
_b
650
942
_c
BK
999
_c
220076
_d
220076