000
00296nam a2200133Ia 4500
008
230108s9999 xx 000 0 und d
100
_a
IRRI
245
0
_a
IRRI Research Paper Services No.24-46
260
_b
IRRI
260
_c
1980
365
_b
0.00
650
_a
Soil science
942
_c
BK
999
_c
249321
_d
249321