How level is sea level
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Defines mean sea level and explains how it is determined. Describes factors that influence sea level at various locations, and analyses the problems of creating a sea level canal in Central America.
Copyright
Registered 24Apr70 · MP20520 (Jan-Jun 1970) Copyright holder: Encyclopaedia Britannica Educational Corp
Sources
- 16mm Filmography (legacy record) — title, description, catalog record
- U.S. Copyright Office, Catalog of Copyright Entries (renewals, 1970–1978) — copyright
Original permalink · Record added 2026-01-23 03:36:54