TY  - RPRT
TI  - [Differing penicillin sensitivity within a Staphylococcus population and its demonstration by penicillic acid].
AU  - W Ritzerfeld
AU  - L Schulte
PY  - 1965
UR  - https://pubmed.ncbi.nlm.nih.gov/5865135/
ID  - 5865135
ER  -