Date: | |
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Description: | Carte-de-visite photomontage double portrait of the geologist and zoologist, Jean Louis Rudolphe Agassiz (1807-1873). Founded the Museum of Comparative Zoo... |
Date: | 07 09 1951 |
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Description: | Dr. Eloise Gerry at her desk at the United States Forest Products Laboratory where she is a distinguished wood technologist. Dr. Gerry, whose research arti... |
Date: | 02 1977 |
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Description: | A man is kneeling on the ice and snow at Potter's Lake. He is running a machine that is testing the oxygen levels in the water, while recording the results... |
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