TY  - BOOK
AU  - Kononova,M.M.
TI  - Soil organic matter:Its nature,its role in soil formation and in soil fer-tility
U1  - 631.4 
PY  - 1961///
CY  - London
PB  - Pergamon Press.
KW  - Soil Fertility
KW  - Soil ScienceSoil Organic
ER  -