Between 1890 and 1906, El Liberal was edited by Miguel Moya (1856–1920), a leading Spanish journalist who would go on to preside the holding company and to found the Asociación de la Prensa de Madrid, which he would also preside from 1895 to 1920.
In 1901, its holding group, Sociedad Editorial de España, also known as "Grupo El Liberal" or the "Trust", decided to publish specific editions for Barcelona, Sevilla y Bilbao. The Bilbao edition, particularly, would become especially prominent as a Republican paper, and would shortly afterwards be bought up by its editor, Indalecio Prieto, who would go on to become a leading figure in Spanish politics, both as minister in successive governments of the Second Spanish Republic and as president of Spain's Socialist party (PSOE), from 1935 to 1948.
- Gabriel Jackson (5 May 2012). Spanish Republic and the Civil War, 1931-1939. Princeton University Press. p. 555. ISBN 1-4008-2018-9. Retrieved 7 June 2015.
- (in Spanish) Gallego, José Andrés (1982) Historia general de España y América, p. 146. Ediciones Rialp At Google Books. Retrieved 7 August 2013.
- Romero Salvadó, Francisco J. (2013) Historical Dictionary of the Spanish Civil War, p. 263. Scarecrow Press At Google Books. Retrieved 7 August 2013.
- Andrew Reynolds (20 October 2012). The Spanish American Crónica Modernista, Temporality and Material Culture: Modernismo's Unstoppable Presses. Bucknell University Press. p. 127. ISBN 978-1-61148-469-4. Retrieved 3 May 2015.