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Physician Mary N. Crawford worked at the Serum Exchange of the Children's Hospital of Philadelphia, where, in 1962, she discovered that she was one of a few people in the world with the rare blood type Lu (a-b-) and that her blood might be donated to a patient in Great Britain.

From the Smithsonian Institute's Women in Science photos Elizabeth Lee Hazen (1888-1975) and Rachel Brown (1898-1980)

Chien-shiung Wu (1912-1997) Columbia University Physics -Women scientists