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Filter: FORMAT_DIMENSIONS of 2.5 x 2.5 inches
Filter: Subject of science
| Date: | 1966 |
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| Description: | Aerial view of International Harvester's Phoenix Proving Ground. Opened in 1947, the proving ground was used by International Harvester through the 1970's ... |
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| Description: | The interior of the sewage treatment plant laboratory. A microscope and many glass beakers are sitting on the counter. |
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| Description: | A scientist leans over a microscope in the sewage treatment plant laboratory. Glass beakers and other tools and equipment are sitting on the counter. |
| Date: | 07 18 1955 |
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| Description: | Five teen boys stand ankle deep in Black Earth Creek (west of Cross Plains) while working together to build a conversion dam in the creek bed. The boys are... |
| Date: | 07 18 1955 |
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| Description: | Three teen boys work together to build up the side of the creek to stop the flowing water from washing the soil away on an edge of Black Earth Creek west o... |
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