Vargas Barrantes, Élida, & Araya Alpízar, C. (2012). 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(1). https://doi.org/10.15517/psm.v10i1.1203