Author: Burch J.B. & Heard W.H.,
Title: Chromosomes numbers of two species of Vallonia (Stylommatopohra, Orthourethra)
Description: 1962. In 8vo, original wrappers, pp. 8 with 7 figs. Offprint from Acta Biol. Acad. Sci. Hungaricae, 12(4)

Keywords: shells molluscs cariology cytology


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