Vacuum tunnel: High Altitude Observatory [HAO] vacuum tunnel cleaning, Mesa Lab (5500), 1981-05-18

Vacuum tunnel: High Altitude Observatory [HAO] vacuum tunnel cleaning, Mesa Lab (5500), 1981-05-18, - 02 COMM. UCAR Communications Records, - 02-COMM. National Center for Atmospheric Research (NCAR) Archives. https://aspace.archives.ucar.edu/repositories/2/archival_objects/18719 Accessed May 01, 2026.