000 00310nam a2200121Ia 4500
008 140113s9999 xx 000 0 und d
082 _a63:574 L5
100 _a"Speeding, C.R.W."
245 _aThe biology of agricultural systems
260 _a1975
_bAcademic Press
_cNew York
300 _a261
942 _cBK
999 _c59267
_d59267