Story in two parts: Part One (8 pp.), Part II (5 pp.). Splash page and first panel of page two show what is clearly a take-off on the 1964 film "Godzilla vs. The Thing" (retitled here "Monster Melee").
The letterer is probably not Bill Yoshida, Samm Schwartz, or Vincent DeCarlo. Story in two parts: Part 1 (5 pp.) and Part 2 (5 pp.).