00429nam a2200145Ia 4500008004100000082002200041100001800063245004200081260004800123300000800171650004100179650003400220653001600254653001300270170901s1976    xx            000 0 und d  a630.7206761bA76A  aArnold, M. H. 0aAgricultural Research for Development  aCambridgebCambridge University Pressc1976  a353  aAgriculture and related technologies  aTechnology (Applied sciences)  aAgriculture  aResearch