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The toothbrush: its use and abuse : a treatise on preventive dentistry and periodontia as related to dental hygiene / by Isador Hirschfeld ... with 174 case histories and 415 illustrations.

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Hirschfeld, Isador, 1881-

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The toothbrush: its use and abuse : a treatise on preventive dentistry and periodontia as related to dental hygiene / by Isador Hirschfeld ... with 174 case histories and 415 illustrations.