Literature
  • Reeves 1992
  • The Sierra Club Handbook of Seals and Sirenians. Sierra Club Books, San Francisco. 359 pp.
  • , Odell 1991
  • Manatees and Dugongs. Facts on File Inc., New York. 192 pp.
  • Ridgeway, 1985
  • Handbook of Marine Mammals, Volume 3: The Sirenians and Baleen Whales. Academic Press, London. 362 pp.
  • Ridgeway, 1989
  • Handbook of Marine Mammals, Volume 4: River Dolphins and the Larger Toothed Whales. Academic Press, London. 442 pp.
  • Ridgeway, 1981a
  • Handbook of Marine Mammals, Volume 1: The Walrus, Sea Lions, Fur Seals and Sea Otter. Academic Press, London. 235 pp.
  • Ridgeway, 1981b
  • Handbook of Marine Mammals, Volume 2: Seals. Academic Press, London. 359 pp.
  • Riedman 1990b
  • Sea Otters. Monterey Bay Aquarium, Monterey, California. 80 pp.
  • Riedman 1990a
  • The Pinnipeds: Seals, Sea Lions, and Walruses. University of California Press, Berkeley. 439 pp.