British water beetles: volume three.
London: Ray Society, 1958. Octavo, text illustrations, publisher's cloth. More
London: Ray Society, 1958. Octavo, text illustrations, publisher's cloth. More
Albury: Co-operative Research Centre for Freshwater Ecology, 1998. Quarto, spirally bound, text illustrations. Identification guide no. 17. More
Albury: Co-operative Research Centre for Freshwater Ecology, 1999. Quarto, spirally bound, colour photographs, other illustrations, softcover. Identification guide no. 21. More