Não informado. (1971). NCSDHA dental hygienist. Northern Californis State Dental Hygienists.
Chicago-viite (17. p.)Não informado. NCSDHA Dental Hygienist. San Francisco, Calif: Northern Californis State Dental Hygienists, 1971.
MLA-viite (8. p.)Não informado. NCSDHA Dental Hygienist. Northern Californis State Dental Hygienists, 1971.
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