1
Published: 1962
Superior document: The University of Kansas paleontological contributions / University of Kansas, Paleontological Institute : Echinodermata 4/6
2
Published: 1971
Superior document: The University of Kansas paleontological contributions / University of Kansas, Paleontological Institute : Echinodermata 11
3
4
Published: 1968
Superior document: The University of Kansas paleontological contributions / University of Kansas, Paleontological Institute : Echinodermata 8/10