Gold Key © December 1971, Hanna-Barbera  Scooby Doo... Where Are You! #9.  The story is "The Phantom Clown". 

With works by: Pencils: Warren Tufts    Inks: Warren Tufts

This book appears in (vg/f 50) with the expected nics, tics, wear and tear. Thanks for looking.     5790-xxxx-50