000
00299nam a2200121Ia 4500
008
140113s9999 xx 000 0 und d
082
_a
31:631.8:633.18 K6.1
100
_a
FAO
245
_a
Statistics of crop responses to fertilizers.
260
_a
1966
_b
FAO
_c
Rome
300
_a
112
942
_c
BK
999
_c
58289
_d
58289