000
00317nam a2200121Ia 4500
008
191031s9999 xx 000 0 und d
100
_a
Ayanaba (A) and Dart (PJ)
245
0
_a
Biological nitrogen fixation forming systems of the tropics
260
_b
John Wiley
260
_c
1977
365
_b
41.50
942
_c
BK
999
_c
203677
_d
203677