1. Acres Ltd. Solar energy resource assess‐ment study for British Columbia. Prepared for the British Columbia Ministry of Energy Mines and Petroleum Resources by Acres Consulting Services Ltd. Vancouver, B.C. 2 Vols.
2. Davies, J.A. and Hay, J.E. Calculation of the solar radiation incident on a horizontal surface. Proceedings, First Canadian Solar Radiation Data Workshop. Edited by: Hay, J.E. and Won, T.K. pp.32–58. Downsview: Canadian Atmospheric Environment Service.
3. Duffie, J.A. and Beckman, W.A. 1974.Solar Energy Thermal Processes, 386Toronto: Wiley.
4. A revised method for determining the direct and diffuse components of the total short‐wave radiation