More to explore:
This was a popular T-shirt in the 70s. I think I had one.
Remember Black light posters. Loved this!! I had it!!
Keep on Truckin' Blacklight Poster - An R. Crumb original design. Officially licensed R. Crumb merchandise. This cool wall black light poster measures 24" x 36". With or without a blacklight, this poster looks awesome!---I had this poster on my bedroom wall!