“Atmospheric Turbidity with the Dual Wavelength Sunphotometer,” Bilton, NOAA

“Atmospheric Turbidity with the Dual Wavelength Sunphotometer,” Bilton, NOAA, Box: 67, Folder: F242. Karl Wolfgang Böer papers, MSS 0483. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/90575 Accessed July 26, 2024.