Description based on: No. 3 (nov. 15 de 1930); title from caption.
Microfilm. no.3 (1930), no.5 (1931) Leiden, The Netherlands : IDC Publishers, 1999. on 1 microfilm reel with other items ; 35 mm. (Latin American anarchist and labour periodicals, 1880-1940 ; reel 82).