https://www.hoover.org/news/more-audiovisual-materials-about-california-digitized-and-online
More Audiovisual Materials about California Digitized and Online | Hoover Institution
audiovisual materialsabout californiadigitizedonlinehoover
https://www.marquette.edu/library/archives/SuperC/UNIV-C-1-14-series2-VCB7.php
REV. VIRGIL C. BLUM, S.J., PAPERS, 1947-1990 AUDIOVISUAL MATERIALS, 1959-1987, n.d. // Archives //...
Rev. Virgil C. Blum, S.J., Papers - Audiovisual Materials, Raynor Memorial Libraries, Marquette University