Description based on: Año 1, núm. 4 (jul. 31 de 1909); title from caption.
Microfilm. ańo 1:no.4-6 (1909):[Lacks no.5] Leiden, The Netherlands : IDC Publishers, 1999. on 1 microfilm reel with other items ; 35 mm. (Latin American anarchist and labour periodicals, 1880-1940 ; reel 52).