American Meteorological Society [AMS]: Weather modifications, Rapid City, South Dakota (1605), 1972-07-06

American Meteorological Society [AMS]: Weather modifications, Rapid City, South Dakota (1605), 1972-07-06, - 02 COMM. UCAR Communications Records, - 02-COMM. National Center for Atmospheric Research (NCAR) Archives. https://aspace.archives.ucar.edu/repositories/2/archival_objects/16589 Accessed June 15, 2026.