Spectral ultraviolet-B radiation fluxes at the earth's surface: Long-term variations at 39 degrees N, 77 degrees W

Correll, David L. ; Clark, Carl O. ; Goldberg, Bernard ; Goodrich, Vernon R. ; Hayes, Douglass R., Jr. ; Klein, William H. ; Schecher, William D. (1992). . Journal of Geophysical Research, 97 , 7579-7591.