BIOTIC References
1171Higgins, H.C., 1974. Specific status of Echinocardium cordatum, E. australe and E. zealandium (Echinoidea: Spatangoida) around New Zealand, with comments on the relation of morphological variation to environment. Journal of Zoology, 173, 451-475.
Search Google Scholar (click an authors name to search for other papers): Higgins, H.CClick here to view all BIOTIC references