The Aging of lakes.

Series: Environmental Studies Series

Duration: 504

Year Published: 1971

Creator: Encyclopaedia Britannica Educational Corporation

Format: 16mm

Sound: sound

Copyright: Registered 19Feb71 · MP21568 (Jan-Jun 1971) Copyright holder: Encyclopaedia Britannica Educational Corp

Description: A: Access CP: Composite Positive B: 800' 16/8/9.5mm 16mm Color Sound 504 , Traces the aging process of lakes, showing how man's interference with the environment causes critical changes in the natural ecology. Describes efforts to preserve and restore damaged lakes. Search Educational Film Journals at Media History Project for references to this film

Complete Record: Traces the aging process of lakes, showing how man's interference with the environment causes critical changes in the natural ecology. Describes efforts to preserve and restore damaged lakes. Search Educational Film Journals at Media History Project for references to this filmNOTE: Two (or more) records have been merged together to create this data.

2 users have this film:
Internet Archive, Library of Congress

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