000 00271nam a2200133Ia 4500
008 161121s9999 xx 000 0 und d
100 _aBalls,W.L.
245 0 _aYields crop
260 _cE&FN Spon Ltd
365 _b0
650 _aNIL
652 _a#N/A
942 _cBK
999 _c27239
_d27239