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Congolese postage stamp commemorating Alexander Fleming's Nobel Prize in Medicine
- After 1970 – before 1991
Stamp depicts Alexander Fleming and penicillin.
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Postage stamp from Comoros commemorating Avicenna (Ibn Sina)
- After 1979 – before 2000
Postage stamp from Comoros, an archipelago of volcanic islands situated off the south-east coast of Africa, featuring a depiction of Persian polymath Avicenna (circa 980 - 1037), also known as Ibn Sina, Abu Ali Sina,…