Dungeon Module C1, The Hidden Shrine of Tamoachan by Harold Johnson and Jeff R Lesson, an adventure for character levels 5-7, for Advanced D & D Game, circa 1981 “the COMPETITION SERIES” “Deluxe set over 15 illustrations” includes a separate booklet of illos and a trifold cover
Secret of the Slavers Stockade
Dungeon Module A2, Secret of the Slavers Stockade by Harold Johnson with Tom Moldvay, an adventure for character levels 4-7, for Advanced D&D game, circa 1980