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• Mary N. Crawford, shown sitting next to blackboard

  • Uploaded by: Smithsonian Institution
  • License: No known copyright restrictions
  • 5 comments
  • 42 favorites
  • 51,753 views
  • Date taken: 2009-02-27 17:23:47
  • Date uploaded: 2009-03-08
  • Tags: smithsonianinstitution, womensday, blood, physician, woman, scientist, labcoat, pearls, smiling, chalkboard, blackboard, bloodtypes, philadelphia, childrenshospitalofphiladelphia, chop, serum, immunology, hematology, transfusion, marycrawford, bloedgroep, schoolbord, krijt, vrouw, teacher, crawford, lessthan, 67, bloodtype, smile, smithsonianinstitutionarchives, womenshistorymonth, womeninscience, 2009, medicine, private, 20thcenturymid
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