From 1962 to 1972 , he was working for Feltrinelli , cooperating with the Marsilio publishers and editing some issues of the Cooperativa Scrittori .
During the 1960s , the group was growing and becoming the Gruppo 63 , Balestrini was the editor of their publications .
From 1962 to 1972 , Balestrini was working for Feltrinelli , cooperating with the Marsilio publishers and editing some issues of the Cooperativa Scrittori .
During the 1960s , the group was growing and becoming the Gruppo 63 , Balestrini was the editor of their publications .