TY  - BOOK
AU  - Allison, F.E..
TI  - Development in soil science 3:Soil organic matter and its role in crop production / 
SN  - 0-444-41017-1
U1  - J:1 
CY  - New York : 
PB  - Elsevier scie ntific Publishing Company.
KW  - Agriculture<Living matter>
ER  -