000
00313nam a2200121Ia 4500
008
180721s9999 xx 000 0 und d
100
_a
GORDON(J.C)
245
0
_a
Biological nitrogen fixation in forest ecosystems:
260
_b
"Junk Publications,Netherland"
260
_c
1983
365
_b
0.00
942
_c
BK
999
_c
151762
_d
151762