000 00256nam a2200085Ia 4500
100 _aKononova, M.M.
250 _a2nd
245 _aSoil organic Matter : Its Nature, its Role an soil Formation and In soil Fertility
260 _bPergamon Press Oxforxd, London
_c1966
082 _a631.417KON
999 _c334038
_d334038