[2] She studied Philosophy and Literature [es] and received a degree in Semitic philology at a time when few women attended university.

[3] She was vice-president of Catholic Action's Superior Council of Women, and was responsible for the Adult Education Commission of the World Union of Catholic Women's Organizations (Unión Mundial de Organizaciones Femeninas Católicas; UMOFC), a position that required her to travel around the world, experiencing diverse living conditions that shaped her later writing.

In 1960, she co-founded the Seminar on Women's Sociological Studies with the support of María Laffitte and the participation of Lilí Álvarez, Elena Catena, and Consuelo de la Gándara.

[4] Also in 1960, Salas was one of the founders and first national president of Manos Unidas [es], and together with Pilar Bellosillo (the sole Spanish woman auditor at the Second Vatican Council), was a fundamental part of the World Union of Catholic Women's Organizations.

She was responsible for initiating the Campaign Against Hunger in Spain, and penned many of the earliest articles which disseminated the ideas contained in the UMOFC's 1955 foundational manifesto.

She wrote assiduously for the journals Ecclesia and Vida Nueva [es], and was a regular columnist for the new edition of the magazine Signo.

Pedro Miguel Lamet recalled words from a tribute to her in Alandar: In the 1950s, we encouraged Catholic women to occupy all spaces.