HAO Project A-53, Prominence Tachometer, bracket, weldment, optical bench, 1973

HAO Project A-53, Prominence Tachometer, bracket, weldment, optical bench, 1973, 04 02 HAO 3 Box 12 Folder 80, Box: 12, Folder: 80. High Altitude Observatory (HAO) Records, 04-02-HAO. National Center for Atmospheric Research (NCAR) Archives. https://aspace.archives.ucar.edu/repositories/2/archival_objects/5638 Accessed July 29, 2026.