Item 021-031a: catalog; Balopticons and Accessories; A catalog of company products for projection apparatus, with instructions and product details, such as specifications.; author n.a.; Bausch & Lomb Optical Company, Rochester, NY; 28 pages; DF 729, undated

Item 021-031a: catalog; Balopticons and Accessories; A catalog of company products for projection apparatus, with instructions and product details, such as specifications.; author n.a.; Bausch & Lomb Optical Company, Rochester, NY; 28 pages; DF 729, undated, Box: 21, Folder: 6. International Association for Identification Records, A&M 3518. West Virginia and Regional History Center. https://archives.lib.wvu.edu/repositories/2/archival_objects/44133 Accessed December 22, 2024.