Aquatic event timing device

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Title: Aquatic event timing device
Date: 1987
Citation: Morgan, J. A., Bartula, W., & Gilbert, R. D. (1987). Aquatic event timing device. U.S. Patent No. 4,657,403. Washington, DC: U.S. Patent and Trademark Office.
URI: http://www.lib.ncsu.edu/resolver/1840.2/1504


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