000 00311nam a2200133Ia 4500
008 180613s9999||||xx |||||||||||||| ||und||
041 _aen
082 _a631.5
100 _aHUGHES D.Harold
245 0 _aCrop production
260 _aNewyork,
_bMacmillan publishing
_c1972
300 _axi, 627p.
942 _cSR
999 _c75882
_d75882