Paperback covers of interest

First, a 1972 cover, uncredited but very much of its era in the psychedelic visuals.This Kelly Freas is just as typical of the earlier women-in-revealing-spacesuits era of pulp illustration.This cover for one of the Avenger pulps is curiously generic. We have the protagonist (a man with his face permanently frozen by shock), the smiling dogs of the title and all we get from HW Scott is a routine nugging?Another typical cover, for 1964. Frank Frazetta was one of the go-to guys for fantasy covers in that era.To wrap up, a Richard Powers cover because why not?#SFWApro