I was going through my old comic collection when I came across a batch of old Marvel Comics sporting the Hanna Barbera brand.
In the late 1970's, Marvel Comics was printing quite a few books starring many different Hanna Barbera characters. I have copies of The Flintstones, Dynomutt, Scooby Doo, Hanna Barbera Spotlight, and Laff-A-Lympics.
Some issues also have pages listing the history of Hanna Barbera animation. With character backstories and animation techniques.
I'll be posting some of the informative stuff later, but for now here are a few cover scans to prove I'm not lying about this crossover between Hanna Barbera & Marvel Comics.