The following page is scanned from the November 1969 edition of Gold Key's Walt Disney Mickey Mouse. This issue featured Goofy as well, so the cover reads Walt Disney Mickey Mouse and Goofy (other issues were titled Walt Disney Mickey Mouse and Pluto). In 1969, the title was published four times a year, so the next issue didn't come out until February of 1970. Gold Key Comics Club News was a feature in which the publisher promoted its various titles. Note that the comics guide is for the month of September. Although the issue has a cover date of November it was actually on newsstands months earlier, conceivably in August.
Gold Key Comics Club News
Copyright © Western Publishing Company, Inc., 1969 
Notice how many television tie-ins are included: comics based on Star Trek, The Twilight Zone, the animated Fantastic Voyage and Thriller (Boris Karloff Tales of Mystery was originally called Thriller but was retitled after the show was canceled). Gold Key's comic book adaptation of Fantastic Voyage (a spin-off of the 1967 film, it ran on ABC during the 1968-1969 and 1969-1970 seasons on Saturday morning) only lasted two issues, the second of which is advertised here.
1 From Walt Disney Mickey Mouse #123, November 1969, Page 31.