1University of Texas at Dallas, Richardson, TX 75080, U.S.A.
Tài liệu tham khảo
U.S. Department of Commerce, Environmental Data Service, National Climatic Center Federal Building, Asheville, NC 28801 U.S.A.
Ref. 1, loc. cit., Tape No. 280 Solar Radiation, Hourly.
1972, 386