Из пројекта Википедија
- From en-wiki
- Постер на једном поштанском сандучету у САД из 1944. који говори о револуционарном ефекту пеницилина у лечењу гонореје.
Source URL: http://www.nlm.nih.gov/exhibition/phs_history/34.html
Believed to be in the public domain. From the exhibit "Images from the History of the Public Health Service" at the NIH website.
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