Brandon Middleton recently sent me a photo of the comic books seen behind Shelly in the store scene in Friday the 13th: Part III. I guess only real Friday the 13th geeks will appreciate this- such as myself. Shelly is also holding a Club International porno mag. Below are the comics; You Will Believe in Gosts by DC Comics, and Master of Kung Fu by Marvel.
Not sure where this photo originated from, so feel free to comment with a link so I can fully credit.