Description based on: 2. época, año 2, no. 6 (feb. de 1930);title from caption.
Latest issue consulted: 3a época, no. 2 (1o mayo 1936).
Microfilm. Leiden, The Netherlands : IDC Publishers, 1999. on 1 microfilm reel with other items ; 35 mm. (Latin American anarchist and labour periodicals, 1880-1940 ; reel 7).
Spanish and Italian.