000
00321nam a2200133Ia 4500
008
230108s9999 xx 000 0 und d
100
_a
"Zandstra HG, et al."
245
0
_a
Methodology for on-Farm Cropping Systems Research
260
_b
IRRI
260
_c
1981
365
_b
0.00
650
_a
Agronomy
942
_c
BK
999
_c
249496
_d
249496