Content by or about Information and Worker Correspondence (ICO) a French councilist group created in 1958, after a split in Socialisme ou Barbarie. The ICO dissolved in 1973. Some of its members took part in the creation of the Échanges et Mouvement network in 1975 .
What Makes ICO Lie?
The S.I. on Informations et Correspondance Ouvrieres. Internationale Situationniste #12 (September 1969)