Stratigraphic and geographic bryozoan abundance gradients in the calcareous shales of the wreford megacyclothem (Lower Permian, Kansas) - Pachut, Joseph F. 1950-; Cuffrey, Roger J. (Lawrence, Kan. : University of Kansas Paleontological Institute, 1999)
ISSN 10468390
Keywords: BRIOZOA FOSSIL; PALEONTOLOGIA; KANSAS (ESTADOS UNIDOS); PALEONTOLOGIA, ESTRATIGRAFICA