Solar heating Ground broken in Boulder for 1st solar heated townhouse in Colorado - maybe U.S. Post Mr 17, 1975 p.20 Grant given to study use of solar heating in adobes. Post AP 20, 1975 p.24 Home in Boulder heated by sun and rocks in walls. Post Ap 20, 1975 p.5E Denver has more homes using solar energy as a primary source of heat than all Kest of nation. RMN Trend Ap'6, 1975 p.4
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