Description based on: Año 1, t. 1, no. 46 (16 de jul. de 1912).
Microfilm. año 1:t.1:no.70,100 (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 94).