000 00333nam a2200121Ia 4500
008 140113s9999 xx 000 0 und d
082 _a633.002 K7
100 _a"Martin, J.H. & Leonard W H"
245 _aPrinciples of field crops production 2nd edition
260 _a1967
_bMacMillan Co.
_cNew York
300 _a1044
942 _cBK
999 _c56871
_d56871