Clark, R. S. (1926). Rays and skates. A revision of the European species. Fishery Board for Scotland, Scientific Investigations 1926. 1: 1-66, 15 unnumbered pls. + Pls. 1-36.
486826
Clark, R. S.
1926
Rays and skates. A revision of the European species
Fishery Board for Scotland, Scientific Investigations 1926