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Georgina Amalia Hernández Aréchaga, Amparo Pérez Borrego, Gladys Hortensia Cabrera Cardoso. "Comportamiento de la Gingivitis Ulceronecrotizante Aguda en la clínica Odontológica "Guaicaipuro", Guanare, Portuguesa, Venezuela." Revista Habanera de Ciencias Médicas 168-178