00306nam a2200121Ia 4500008004100000082001700041100001900058245001800077260003500095300001500130600001900145650002000164140224s9999    xx            000 0 und d  a631.427.3 J1  aMitchell, R.L.  aLeaf analysis  aLondonbHigher and Wattsc1951  aviii,176p.  a R.L.Mitchell   aFoliar dignosis