Martín Fierro (1924–27) played a major role in the great proliferation of avant-garde journals published in Argentina, more specifically in the 1920s Buenos Aires. Evar Méndez led it, though throughout 1925, Oliverio Girondo, Eduardo J. Bullrich, Sergio Piñero, and Alberto Prebisch also took part in its administration. Among the participants were key Argentinean writers such as Girondo, Ricardo Molinari, Leopoldo Marechal and Jorge Luis Borges, among others; as well as the artists Emilio Pettoruti, Xul Solar, and Norah Borges. Martín Fierro ceased publication when, preceding the presidential candidacy of Hipólito Yrigoyen, the core group was divided between those who supported the magazine assuming a political stance and those who did not. This internal bickering continued until the publication’s end. It is important to recognize that Martín Fierro was seen in its time as a key fixture of the Avant-garde in Argentina.This document is relevant because it deals with the two editorial houses established by Martín Fierro: la Sociedad Editorial Proa [Martín Fierro: Proa Publishing House] (founded in May 1924 by Oliverio Girondo, Ricardo Güiraldes, and Evar Méndez) and the Martín Fierro publishing house. These undertakings were part of a strategy to disseminate the works of those writers considered important to the aesthetic renovation project advocated by the newspaper. Inquisiciones [Inquisitions] (1925, Proa publishing house) by Jorge Luis Borges and the popular edition of Veinte poemas para ser leídos en el tranvía [Twenty poems to be read in a streetcar) (Martín Fierro publishers) by Oliverio Girondo were among the first publications to appear.