00296nam a2200097Ia 4500008004100000082001500041100004000056245005100096260004300147300000800190140113s9999    xx            000 0 und d  a631.42  K1  a"Chapman, Homer.D. and Pratt, P.F."  aMethods of Analysis for Soils Plants and Water  a1961bUniversity of CaliforniacU.S.A.  a309