00290nam a2200109Ia 450000500170000000800410001708200140005810000170007224500360008926000470012530000080017220260224040936.0260224s9999||||xx |||||||||||||| ||und||  a631.3 BAT  aBates, W.N.  0aMechanization of tropical crops  aNew York: English Lang. Book Societyc1957  a410