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A portable,audible-Interval signal device1 |
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| Authors: | Ted Weigt |
| Institution: | 1. Regional Primate Research Center, Primate Laboratory, University of Wisconsin, 1223 Capitol Court, 53706, Madison, Wisconsin |
| Abstract: | Described here is a compact and battery-operated unit that produces a short audible signal at uniform intervals, variable from 2 sec to 2 min. |
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