Studies on Long Term Average Optical Efficiency for Principal Solar Collectors and Shading Factors for Windows http://127.0.0.1/xmlui/handle/123456789/2565 Tue, 14 Apr 2026 23:25:30 GMT 2026-04-14T23:25:30Z Studies on Long Term Average Optical Efficiency for Principal Solar Collectors and Shading Factors for Windows http://127.0.0.1/xmlui/handle/123456789/2566 Studies on Long Term Average Optical Efficiency for Principal Solar Collectors and Shading Factors for Windows Rahman, A.N.M. Mizanur Mon, 01 Sep 1997 00:00:00 GMT http://127.0.0.1/xmlui/handle/123456789/2566 1997-09-01T00:00:00Z