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Keywords from Image Description:
smithsonian institution smithsonianinstitution smithsonian institution archives smithsonianinstitutionarchives womens history month womenshistorymonth woman scientist seated instruments forties microscope rca mineralogy usgs knudsen indoor monochrome Subject Zworykin Elaine ampnbspampnbspampnbspampnbspampnbspampnbspampnbspGeological