1. The biogeochemistry of vanadium;Bertrand;Bull. Amer. Mus. Nat. Hist.,1950
2. A handbook of the littoral echinoderms of Porto Rico and the other West Indian Islands;Clark,1933
3. Die Haüfigkeiten der Schwermetalle in Meerestieren;Noddack;Ark. Zool.,1940
4. A possible source of vanadium in sedimentary rocks;Phillips;Amer. J. Sci.,1918
5. Prezzi di vendita degli animali marini conservati;Stazione Zoologica di Napoli,1941