[1]
A. R. Loeblich, R. C. Douglass, W. S. Cole, H. Tappan, and M. Reichel, “Part C, Protista 2, vol. 1 & 2, v.1, Ch.4, p. 436-510”, InvertebratePaleo, Jan. 1964, doi: 10.17161/dt.v0i0.5093.