John Keyes, president of International Solarthermics Corporation, shown with the backyard solar heating system he developed..., 05/1975.
| Uploaded by | U.S. National Archives |
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| Views | 14,671 |
| Date taken | 1975-05 |
| Date uploaded | 2012-04-10 |
| Tags | usnationalarchives, documerica, environmentalprotectionagency, boydnorton, solarenergy, nara:arcid=557312, 1970s, technology, power, heatstorage |
| Visibility | public |