Vortex pattern (2042B), 1973-10-18, - 02 COMM. UCAR Communications Records, - 02-COMM. National Center for Atmospheric Research (NCAR) Archives.
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Vortex pattern (2042B), 1973-10-18, - 02 COMM. UCAR Communications Records, - 02-COMM. National Center for Atmospheric Research (NCAR) Archives. https://aspace.archives.ucar.edu/repositories/2/archival_objects/18737 Accessed May 01, 2026.