View-Master invention celebrated at Oregon Caves National Monument
VIEW-MASTER HISTORICAL MARKER: OREGON INVENTORS OF THE 3D VIEWER HONORED - Willamette Living Magazine
Vintage View Master with 20 Reels – Duckwells
May / June 2023 - Cornellians
Portland Architecture: New Projects
View-Master
Willamette Post Historical Marker
Caves, history and invention - story of the View-Master - Oregon Travel Information Council
Virtual and Online Exhibitions and Programs
Oregon Historical Quarterly/Volume 18/Number 3 - Wikisource, the free online library