TY  - BOOK
AU  - Kononova, M.M.
TI  - Soil organic matter; its nature , its role in soil formation and in soil fertility
U1  - 631.417 K93S 
PY  - 1966///
CY  - Nowakowski, Oxford
PB  - Pergamon Pr.
KW  - HUMUS
ER  -