Pendulums.
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✎ Suggest a correctionComplete catalog record
Pendulums. Thorne Films. 4 Min., Sd., Color, 8 Mm. (Elementary Science Series, No. 172) © Thorne Films, Inc.; 25apr68 (In Notice: 1967); Mp18251.
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Original permalink · Record added 2023-02-26 23:41:43 · Suggest a correction