"Dewey Decimal System Day December 10th celebrates a system of classification and the man who invented it."https://www.nationaldaycalendar.com/national-day/dewey-decimal-system-day-december-10?utm_source=Iterable&utm_medium=email&utm_campaign=16011205&hashed_email=6c23328441e0f46865e8039a24ce7ccf8880f2d7&email=yeremiah%40aol.com
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