Metric System: English & Metric Weight & Volume
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Copyright
Registered 15Jan72 · MP22883 (Jan-Jun 1972) Copyright holder: Victor Kayfetz Productions, Inc Production company: Visual Instruction Productions
Sources
- U.S. Copyright Office, Catalog of Copyright Entries (renewals, 1970–1978) — title, year, creator, length, copyright
Record added 2026-06-28T22:00:53Z