TY  - BOOK
AU  - Gray, T R G
AU  - Williams, S T
TI  - Soil micro-organisms
SN  - 0582 41609
U1  - 631.46/GRA 
PY  - 1971///
CY  - London
PB  - Longman
KW  - micro-organisms
KW  - Soil microbiology
ER  -