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| Date: | 01 01 1947 |
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| Description: | Helen Rosenbaum, pharmacist, pauses in her laboratory. |
| Date: | 01 01 1947 |
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| Description: | Druggist Helen Rosenbaum's dispensary. |
| Date: | 1925 |
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| Description: | Group of ten people, both men and women, observing a researcher working in a laboratory with young chickens in a wire cage beneath a lamp. The researcher w... |
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