Further Adventures of those Fabulous Furry Freak Brothers by Gilbert Shelton (1972)

Description from Third Mind Books:

The second number of the series by Gilbert Shelton devoted to the adventures of the lovable trio of dope-heads, among the most famous emblems of the underground comix counterculture. Written & mostly illustrated by Shelton, with contributions of episodes drawn by Bobby London, Ted Richards & Dave Sheridan. The dizzying epitome of stoned humor. This is the second printing to the best of our knowledge, based on the latest, occasionally contradictory comix scholarship, indicated by blue background of inner front cover illustration; & an ad for "Free Funnies" on forty-ninth (unpaginated) page. A classic Comix collectible, in not the rarest but still a very rare & early form.