TY  - BOOK
AU  - Allison, F E
TI  - Soil organic matter and its role in crop production
SN  - 0444410171
U1  - 631.417/ALL 
PY  - 1973///
CY  - Amsterdam
PB  - Elsevier Scientific Publishing Company
KW  - organic farming
KW  - soil science
ER  -