Literature
  • 1984
  • The Encyclopedia of Mammals. Facts on File Publications, New York. 895 pp.
  • 1990
  • The Natural History of Seals. Facts on File Publications, New York. 196 pp.
  • 1987
  • The Natural History of Whales and Dolphins. Facts on File Publications, New York. 343 pp.
  • Riedman 1990a
  • The Pinnipeds: Seals, Sea Lions, and Walruses. University of California Press, Berkeley. 439 pp.
  • Verboom, Kastelein 1995b
  • The rutting whistles of a male Pacific walrus (Odobenus rosmaruas divergens), In: Sensory systems of Aquatic Mammals (eds. R. A. Kastelein, J. A. Thomas and P. E. Nachtigall), De Spil Publishers, Woerden Holland.
  • Reeves 1992
  • The Sierra Club Handbook of Seals and Sirenians. Sierra Club Books, San Francisco. 359 pp.
  • Leatherwood, Reeves 1983
  • The Sierra Club Handbook of Whales and Dolphins. Sierra Club Books, San Francisco. 302 pp.
  • 1984
  • Time and location of mating and associated behavior of the Pacific walrus (Odobenus rosmaruas divergens ) Illiger. In: Soviet -American cooperative research on marine mammals. Pinnipeds (F. H. Fay and G. A. Fedoseev, eds.) NOAA Techn. Rept. NMFS 12: 1-104, p 81-88.