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 Odobenusrosmarus, NGR, Winter, p 124-145.