TY  - BOOK
AU  - Gray T R G
AU  -  Williams S T
TI  - Soil micro-organisms
U1  - G91:(J:1), L1 
PY  - 1971///
CY  - Edinburgh
PB  - Oliver & Boyd       
KW  -  Microbiology
KW  - Biology
N1  - Bibliography 197-234p
ER  -