Vargas Barrantes, Élida, and Carlomagno Araya Alpízar. “Influence of Socio-Demographic Conditions in Attitudes and Behaviour in Sexuality That Express the Youth of Ninth Year from a Public School in the Canton Central Alajuela, Costa Rica”. Población y Salud en Mesoamérica 10, no. 1 (July 1, 2012). Accessed March 29, 2024. https://revistas.ucr.ac.cr/index.php/psm/article/view/1203.