Hewlett-Packard HP-35 Math Pac owner's manual, 1974

Hewlett-Packard HP-35 Math Pac owner's manual, 1974, WBC Box 4 Item 64, Box: 4. William Bradley Calculator Collection, WBC. National Center for Atmospheric Research (NCAR) Archives. https://aspace.archives.ucar.edu/repositories/2/archival_objects/9458 Accessed June 15, 2026.