Bony plates and spikes helped dinosaurs such as the Stegosaurus defend themselves against meat-eating predators.

Bony-Skinned Dinosaurs 2008, Chelsea House Publications, New York, NY

ISBN-13: 9781604134049

Hardcover

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Bony-Skinned Dinosaurs 2002, Chelsea Clubhouse, Philadelphia, PA

ISBN-13: 9780791069905

Hardcover

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