000 00315nam a2200121Ia 4500
001 MPKV109126
008 120911s9999 xx 000 0 und d
082 _a630
245 _aAgricultural Research Vol 30
_c;
246 _aAgricultural Research Vol 19
260 _aWashington
_bU S D A
_c1981-82
650 _aAgronomy
999 _c72471
_d72471