oldschoolfrp:Unicorn by Dᴀʀʟᴇɴᴇ, title page of the AD&D Dungeon Masters Guide, TSR, 197

oldschoolfrp:Unicorn by Dᴀʀʟᴇɴᴇ, title page of the AD&D Dungeon Masters Guide, TSR, 1979. -- source link