000
00316nam a2200121Ia 4500
001
MPKV052710
008
120911s9999 xx 000 0 und d
082
_a
630
245
_a
Journal of Agricultural Research Vol 20
_c
;
246
_a
Journal of Agricultural Research Vol 20
260
_c
1920-21
650
_a
Agronomy
999
_c
50710
_d
50710