Não informado. (1926). Dental rays. University of Pittsburgh, School of Dentistry.
Lua i Stíl Chicago (17ú heag.)Não informado. Dental Rays. Pittsburgh, Pa: University of Pittsburgh, School of Dentistry, 1926.
Lua MLA (8ú heag.)Não informado. Dental Rays. University of Pittsburgh, School of Dentistry, 1926.
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