Fantagraphics
Promethean Enterprises #3
published January 1971
R. Crumb's Comics and Stories #1 [unnamed variant]
published June 1969
was R. Crumb's Comics and Stories [Story on Interior Page(s)]
R. Crumb's Fritz the Cat #[nn]
published October 1969
was Special Agent for the C.I.A. [Story on Interior Page(s)]
The People's Comics #[nn] [50ยข Cover Price]
published September 1972
was Superstar [Story on Interior Page(s)]