Vols. for 1940-1941 filmed by Yale University Photographic Services, 1983.
Microfilm. [London, England] : British Museum Microfilm Service, 19[--] 3 microfilm reels ; 4 in., 35 mm.
Issues for 1929-Aug. 24, 1934, organe de l'Opposition communiste; Sept. 1934-35, organe du Groupe Bolchévik-Léniniste, S.F.I.O. ; 1936- organe theorique communiste internationaliste (Bolchévik-Léniniste)