Clark, A. H. (1920). Echinoderms. Report of the Canadian Arctic Expedition 1913-1918. Vol. VIII. Mollusks, Echinoderms, Coelenterates, etc. Part C: Echinoderms. Echinoderms. Report of the Canadian Arctic Expedition 1913-1918. Vol. VIII. Mollusks, Echinode
