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... |
Date: | 01 15 1959 |
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Description: | Robert Butler, a public health technologist with the city health department, is examining a used filter. He is atop the second floor of the City-County bui... |
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