TY  - BOOK
AU  - Walker,N.
TI  - Soil microbiology
SN  - 0408706708
U1  - 631.46 
PY  - 1975///
CY  - London
PB  - Butterworths
KW  - Soil microbiology
KW  - Biogeochemical cycles
KW  - Nitrogen cycle
KW  - Soil protozoa
N1  - Includes index
ER  -