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...libraries and small academic libraries continue to use the [[Dewey Decimal Classification]] (DDC). {{Citation needed|date=January 2010}} .... It has been criticized as lacking a sound theoretical basis; many of the classification decisions were driven by the particular practical needs of that library, ra

...مكورات العنقودية.<ref>{{cite journal |author=Millichap JG |title=Etiologic classification of attention-deficit/hyperactivity disorder |journal=Pediatrics |volume=121