1. CIE (Commission International de l’Eclairage), Committee E-3.2, Information No. 3, Paris (1964).
2. M. P. Thakaekara:Proceedings of the International Solar Energy Society Conference, Los Angeles, July 28–August 1, 1975.
3. A. B. Meinel andM. P. Meinel:Applied Solar Enervy (Reading, Mass., 1976).
4. M. P. Thakaekara:Appl. Opt.,8, 1713 (1969).
5. M. P. Thakaekara:Sol. En.,14, 109, (1973).