The Monsters Know What They're Doing     Dungeons And Dragons (no source link)
Monstrosities     Swords & Wizardry original/official source
Angry Golem (web)     D&D 5e original/official source
Mythic Monster Manual v1     Pathfinder original/official source
Monster Ecology Anthology     D&D 5e (no source link)
Critter Cache: Prehistoric Beasts     D&D 4e original/official source
Hacklopedia Of Beasts     Hackmaster (no source link)
Hacklopedia Of Beasts Vol 4     Hackmaster (no source link)