Author: Rexroad, C.B., 1957-1958.:
Title: Conodonts from the Chester Series in the type area of Southwestern Illinois. // Conodonts from the Glen Dean Formation (Chester) of the Illinois Basin. [Rep. Invest. Illinois State Geol. Syurv., 199 & 209.]
Description: Urbana, Ill. Pp. 43; pp. 27; with many microphotos on 2 + 4 pls., several figs. and tabs, in 35 illus. in text, refs. Two papers, orig. wrs. - Mississippian (Lower Carboniferous).

Keywords: