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Springer Publishing Company ‎(1999)‎

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By Lucas Victoria S.   Contreras Alvaro   Loukissa Maria   Roberts Graham J.   in Journal of Dentistry for Children

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American Academy of Pediatric Dentistry‎(2001)‎

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By Ashley Paul F   Roberts Graham J   in Primary Dental Care

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Faculty of General Dental Practice (UK)‎(2002)‎

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