- Heat-Grabber plans, Mother Earth News late 1977:
http://www.motherearthnews.com/Do-It-Yourself/1977-09-01/Mothers-Heat-Grabber.aspx
1978 updated plans using wood and other easily available materials:
http://snipurl.com/2xy0t ; original:
http://www.motherearthnews.com/Modern-Homesteading/1978-11-01/Mothers-Heat-Grabber-Is-Back.aspx
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