Literature
  • 1984
  • The Encyclopedia of Mammals. Facts on File Publications, New York. 895 pp.
  • , 1988
  • Five Kingdoms. W. H. Freeman and Company, New York. 376 pp.
  • 1990
  • Whales and Dolphins. Salamander Books Limited, London. 192 pp. (Published in the United States as The Illustrated Encyclopedia of Whales and Dolphins, by Portland House, New York).
  • 1985
  • Airborne acoustic communication in the Walrus Odobenus rosmarus, NGR, Winter, p 124-145.