TY  - BOOK
AU  - Ashworth,John M.
AU  - Smith,John E.
ED  - Society for General Microbiology.
TI  - Microbial differentiation: twenty-third symposium of the Society for General Microbiology held at Imperial College, London, April 1973 
SN  - 0521201047
PY  - 1973///
CY  - Cambridge
PB  - University Press
ER  -