Twenty-five hour clock [videorecording]
By: BBC ; written and produced by John Groom ; narrator, Paul Vaughan.
Contributors: Groom, John.; Vaughan, Paul.; BBC Television.; International Tele-Film.
Series: Horizon
Publisher: International Tele-Film
Published: 1991
Place of publication: Bolton
Language: eng
Number of pages: 50
Subjects: Biological rhythms.; Circadian rhythms.
Notes: FOR CLASSROOM USE ONLY.

VHS.

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