Description based on: Año 1, no. 2 (20 de abril de 1912); title from cover.
Microfilm. v.1:no.2-4 (1912) Leiden, The Netherlands : IDC Publishers, 1999. on 1 microfilm reel with other items ; 35 mm. (Latin American anarchist and labour periodicals, 1880-1940 ; reel 71).