Optical Illusions. Pt. 2
Sign in to track this film in your collection or want list.
Copyright
Registered 27May66 · JP13678 (Jan-Jun 1972) Copyright holder: Gerrit C. Zwart d.b.a. Visual Sciences (in notice: Gerrit C. Zwart)
Sources
- U.S. Copyright Office, Catalog of Copyright Entries (renewals, 1970–1978) — title, year, creator, length, copyright
Record added 2026-06-28T22:00:55Z