00420nam a2200121Ia 4500008004100000082001600041100008100057245008700138260002700225300001000252600001900262650001700281130903s9999    xx            000 0 und d  a631.417  K1  a M.M. Kononova and Translated from Russian T.Z.Nowakowski and G.A.Greenwood.  aSoil organic matter; its nature, its role in soil formation and in soil fertility.  aOxfordbPergamonc1961  a450p.  aKononova, M.M.  aSoil science