Word: kohlstedt
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Dates: during 1960-1969
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...ahead." The Grand Rapids library, which used to lose between $10,000 and $15,000 a year on stolen books, began slipping Trikilis' Sentron devices inside their books eight months ago, has not lost one of its treated volumes since. Says Grand Rapids Librarian Donald W. Kohlstedt: "The deterrent value of the system alone is as great as the detection...
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