TY  - BOOK
AU  - Richards,B.N.
TI  - Introduction to the soil ecosystem
SN  - 0582441307
U1  - 574.5264 
PY  - 1974///
CY  - Harlow [Eng.], New York
PB  - Longman
KW  - Soil ecology
KW  - Sols
KW  - Ecosystems
ER  -