00306nam a2200109Ia 450000500170000000800410001708200160005810000170007424500590009126000380015030000080018820260224040918.0260224s9999||||xx |||||||||||||| ||und||  a635.028 BAL  aBalls, R.C.  0aHorticultural engineering technology : field machinery  aLondon: Macmillan Book Co. c1985  a216