000
00249nam a2200109Ia 4500
008
180721s9999 xx 000 0 und d
100
_a
Sp.Palaniappan
245
0
_a
Cropping systems in the tropics
260
_b
Nil
260
_c
1985
942
_c
BK
999
_c
117977
_d
117977