00309nam a2200109Ia 450000500170000000800410001708200140005810000200007224500610009226000380015330000080019120260224040810.0260224s9999||||xx |||||||||||||| ||und||  a338.9 AND  aAndersen, P.P.  0aAgricultural research technology in economic development  aLondon: New York: Longman, c1982  a261