Note: - Title from cover.
Microfilm of a reprint. Originally published monthly : México, D.F., Mexico.
- DOI: 10.1163/ejb9789004244900.LALP-Mx-35
- Jahrg. 1-4 (1941-1945):[Gaps] Leiden : Brill, 2013. (Latin American anarchist and labour periodicals, 1880-1940 ; LAL-1:Mx-35.). Scanned from microfilm.