Pennsylvanian invertebrates of the Mazon Creek area, Illinois / Eugene S. Richardson, Jr. --

v.12:no.4(1956)

Pennsylvanian invertebrates of the Mazon Creek area, Illinois / Eugene S. Richardson, Jr. --

v.12:no.1(1956)

A new hydrozoan from the Pennsylvanian of Illinois / [by] Matthew H. Nitecki -- and Eugene S. Richardson, Jr. --

v.30:no.1(1972)

Pennsylvanian invertebrates of the Mazon Creek area, Illinois: the Essex fauna and medusae / Ralph Gordon Johnson -- and Eugene S. Richardson, Jr. --

v.12:no.7(1968)

Pennsylvanian invertebrates of the Mazon Creek area, Illinois / Eugene S. Richardson, Jr. --

v.12:no.3(1956)

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)

Paraparchites mazonensis n. sp. (Ostracoda) from Middle Pennsylvanian ironstone concretions of Illinois / I. G. Sohn --.

v.37:no.2(1977)

Illinois biological monographs.

v. 6 (1920)

Illinois biological monographs.

v. 2 (1915-1916)

Illinois biological monographs.

v. 3 (1916-1917)

Flora of Illinois, containing keys for identification of flowering plants and ferns.

no.7

Flora of Illinois, containing keys for the identification of the flowering plants and ferns, by George Neville Jones ...

no.2

Illinois biological monographs.

v. 4 (1918-1919)