Couzijn, H.W.C. (1978). The method of polythetic analysis applied to a source of taxonomic difficulty, the genus Heterometrus H. & E., 1828 (Scorpionidae). Pp. 327-333 in: Arachnology : seventh international congress. Symposia of the Zoological Society of London. 42. Academic Press: London. 530 pp. ISBN 0-12-613342-5.
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Couzijn, H.W.C.
1978
The method of polythetic analysis applied to a source of taxonomic difficulty, the genus Heterometrus H. & E., 1828 (Scorpionidae). Pp. 327-333 in: Arachnology : seventh international congress.
Symposia of the Zoological Society of London
42. Academic Press: London. 530 pp. ISBN 0-12-613342-5.
Publication
"the proceedings of a symposium organized jointly by the Zoological Society of London, the Centre international de documentation arachnologique, and the British Arachnological Society held at the University of Exeter, England on 27 July to 4 August 1977"