00278nam a2200097Ia 4500008004100000082002900041100001800070245006400088260002000152300000800172140113s9999    xx            000 0 und d  a631.42+581.81:543.08  L2  a"Walsh, L.M."  aInstrumental methods for analysis of soils and plant tissue  a1972bSSSAcUSA  a222