Oxford, Oxford University Press, 2002. Paperback, 23 cm, 221 pp. Ills.: b/w and color illustrations. "Oxford Animal Biology Series". Cond.: goed / good. ISBN: 0198509685. Oxford Animal Biology Series.
The New Naturalist. A Survey of British Natural History. Life in Lakes and Rivers.
London, Bloomsbury Books, 1974. Hardcover with dustjacket, 22 cm, 320 pp. Ills.: black and white illustrations. Small damage at dustwrapper. Cond.: goed / good. ISBN: 1870630297.