[1]
Wright, C.W. and Calloman, J.H. 1996. Part L, Mollusca 4 (Revised), vol. 4, Ch. 2, p. 67-133.
Treatise on Invertebrate Paleontology
. (Jan. 1996). DOI:
https://doi.org/10.17161/dt.v0i0.5280
.