Comic Book Plus has a collection of “Atomic Comics” from the late 1940s through the 1950s that attempted to capitalize on the public’s fascination with atomic energy.
Pulp
Pulp Pirate Comics and Stories
Comic Book Plus has a collection of pulp pirate comics and stories.
Pulp Science Fiction Inspiration
This Flickr album has a series of covers of British pulp science fiction magazines. There’s lots here for inspiration.