Revision of the Holocystites fauna (Diploporita) of North America / [by] Christopher R.C. Paul --

v.24(1971)

New information on the Holocystites fauna (Diploporita) of the Middle Silurian of Wisconsin, Illinois, and Indiana / Terrence J. Frest --, Donald G. Mikulic -- and Christopher R. C. Paul --.

v.35:no.6(1977)