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Word: ext (lookup in dictionary) (lookup stats)
Dates: during 1952-1952
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Usage:

UNIVERSITY OF CHICAGO Research Institute requires 30 gal. samples of city of Chicago water at least five yrs. and not more than 20 yrs. old. Phone Midway 3-0800, Ext. 2502, or write 5640 Ellis...

Author: /time Magazine | Title: Science: Water Clock | 8/18/1952 | See Source »

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