Sam H. Ridgway

• Handbook of Marine Mammals Vol. 6
• Mammals of the sea
• Seals
• The walrus, sea lions, fur seals and sea otter
• River dolphins and the larger toothed whales
• River dolphins and the larger toothed whales
• Seals
• The dolphin doctor
• The dolphin doctor
• The sirenians and baleen whales
• The sirenians and baleen whales
• The walrus, sea lions, fur seals and sea otter