A population-based serosurveillance of syphilis in Costa Rica - Larsen, Sandra A; Oberle, Mark W. 1948-; Sanchez-Braverman, Juana M; Rosero Bixby, Luis 1952-; Vetter, Kathleen M (USA : [editor no identificado], 1991)
"Sexually transmitted diseases, april-june 1991"
Keywords: SIFILIS; ENFERMEDADES VENEREAS -- COSTA RICA; CUELLO UTERINO -- CANCER