Energy conversion.
Sign in to track this film in your collection or want list.
Copyright
Registered 7Nov73 · MP25172 (Jan-Jun 1974) Copyright holder: Doubleday and Company, Inc
Sources
- 16mm Filmography (legacy record) — title
- U.S. Copyright Office, Catalog of Copyright Entries (renewals, 1970–1978) — copyright
Original permalink · Record added 2025-10-23 02:42:40