All Monsters (7)

• 30 HD Monsters in Basic Fantasy Field Guide Omnibus
  
• 30 HD Monsters in Basic Fantasy Role-Playing Game
  
• 30 HD Monsters in Old-School Essentials Classic Fantasy
  
• 30 HD Monsters in OSRIC
  
• Apatosaurus - Jurassic herbivore, once called brontosaurus
  OSRIC
• Dinosaur, Apatosaurus (Brontosaurus) - Most recognizable member of the sauropod family with heavy body, elephantine legs and feet, and long neck and tail
  Field Guide
• Dragon Turtle - Massive aquatic creatures up to 200 feet long, occasionally mistaken for rocky outcroppings or small islands
  BFRPG, OSE, OSRIC