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2. Crisp V. H. C., Littlefair P. J., Cooper I. and McKennan G., Daylighting as a passive solar energy option: and assessment of its potential in non-domestic buildings. Report BR129, BRE, Garston, UK, 1988.
3. Energy audits and surveys of air-conditioning;Lam,1995
4. Designing buildings with innovative daylighting;Littlefair,1996
5. Monodraught: Sunpipe information leaflet,1997