@misc{indiciae6d17ca50a138, title = {Penicillin-resistant pneumococci.}, author = {N Manek}, year = {1991}, doi = {10.1016/0195-6701(91)90107-j}, url = {https://pubmed.ncbi.nlm.nih.gov/1684607/}, note = {Source identifier: 1684607} }