000 00280nam a2200109Ia 4500
008 170707s9999 xx 000 0 und d
050 _a338.1 Sy87
100 _a"Teng, Paul"
245 0 _aSystems approaches for agricultural development
260 _c1993
942 _2lcc
_cBK
_kCirc.
999 _c13473
_d13473