Baquerizo A., Mario, Walter Vega D., and Mercedes Castro H. 1994. “Seroprevalence of H.I.V. Infection in Pregnant Women in Labor at the Enrique C. Sotomayor Gynecological-Obstetric Hospital”. Revista Universidad De Guayaquil 91 (3): 63-78. https://doi.org/10.53591/rug.v91i3.968.