Concrete tile

Levinson, Ronnen M, Paul H Berdahl, Hashem Akbari, William A Miller, Ingo Joedicke, Joseph C Reilly, Yoshi Suzuki, and Michelle Vondran. "Methods of creating solar-reflective nonwhite surfaces and their application to residential roofing materials." Solar Energy Materials and Solar Cells 91.4 (2007) 304–314.

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Levinson, Ronnen M, Hashem Akbari, Paul H Berdahl, Kurt Wood, Wayne Skilton, and Jerry Petersheim. "A novel technique for the production of cool colored concrete tile and asphalt shingle roofing products." Solar Energy Materials and Solar Cells 94.6 (2010) 946–954.

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