A Guide To The Genera And Species Of Parnassinae. Bulletin of the British Museum (Natural History) Entomology, Vol. 31, No. 4.
London, UK: British Museum (Natural History) Entomology, 1975. 8vo. Wraps, Very Good with tears to covers and pages within. Pp. 75 - 105. 15 B&W plates. Text in English and Latin. More