00563nam a2200169Ia 4500008004100000082001600041100002000057245004900077260005000126300000800176650004100184650003400225653001500259942001200274999001700286952009000303170901s1956    xx            000 0 und d  a633.2bH30T  aHarlan, R. Jack 0aTheory and Dynamics of Grassland Agriculture  aNew YorkbD. Van Nostrand Company, Inc.c1956  a281  aAgriculture and related technologies  aTechnology (Applied sciences)  aGrasslands  2ddccBK  c15290d15290  00102ddc4070aRAUbRAUd2017-10-18l0o633.2 H30Tp157r2017-10-18w2017-10-18yBK