1. Berger, D., D F. Robertson, and R. E. Davis. 1975. Field measurements of biologically effective UV radiation. In Climatic Impact Assessment Program Monogr. 5, Part 1, U.S. Dept. Transportation DOTTST 75–55, National Technical Information Service, Springfield, VA. 233–264.
2. Calkins, J., J. D. Buckles, J. R. Moeller. 1976. The role of solar ultraviolet radiation in “natural” water purification. Photochem. Photobiol. 24: 49–57. Jerlov, N.G. 1968. Optical Oceanography, Elsevier Publishing Company, Amsterdam.
3. Robertson, D. F. 1972. Solar ultraviolet radiation in
4. relation to human sunburn and skin cancer. Ph.D Thesis, University Queensland, Australia.
5. Smith, R. C., and J. Calkins. 1976. The use of the Robertson meter to measure the penetration of solar