Durham, J. W. & Morgan, S. R. 1978. New sand dollars (Echinoidea) of the genera Merriamaster and Dendraster from Purisima Formation, California. Proceedings of the California Academy of Sciences 41, 297-305.
175853
Durham, J. W.; Morgan, S. R.
1978
New sand dollars (Echinoidea) of the genera Merriamaster and Dendraster from Purisima Formation, California