00620cam a22002177a 4500003000500000005001700005008004100022010001000063011001000073035001000083040000900093082001500102100002000117245007000137260006100207300001900268490003400287650002300321650002400344830003400368CHAP20220329135546.0971013s1948 r 00010 d a38480 a39452 a43573 cCHAP a544.6bM5800aMitchell, R. L.14aThe spectrographic analysis of soil, plants and related materials aHarpenden :bCommenwealth Bureaus of Soil Science,c1948 a183 p.b: ilus 0aTechnical communicationv; 4414aEspectroquímica.14aSuelosxAnálisis.0 aTechnical communicationv; 44