I started D&D back in 1978 with Holmes Basic there wasn’t any
module included (B1 & B2 came with later Basic Sets). Within my
friend and DM’s Basic Set were Dungeon Geomorphs Set 1 and Monster
& Treasure Assortment Levels One-Three. Geomorphs were the maps and
the Monster & Treasure assortments populated them.
So I was at Endgame in Oakland, CA perusing their used goods and came
across this 1980 compilation of the three sets of Monster &
Treasure Assortments, levels one-nine.