A strange arthropod from the Mazon Creek of Illinois and the Trans Permo-Triassic Merostomoidea (Trilobitoidea) / [by] Frederick R. Schram --

v.20:no.6(1971)

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

v.12:no.2(1956)

New species of Leptocera Olivier in the burrows of the pocket gopher, Geomys Bursarius Illinoensis Komarek and Spencer, found in Illinois (Diptera: Sphaeroceridae) [by] O.W. Richards.

v.44:no.19(1964)

A recently discovered Phlegethontia from Illinois / by William D. Turnbull and Priscilla F. Turnbull.

v.37:no.19(1955)

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

v.12:no.5(1959)

The Indian tribes of the Chicago region, with special reference to the Illinois and the Potawatomi / by William Duncan Strong -- Former Assistant Curator of North American Ethnology and Archaeology. 8 plates.

no.24(1926)

Pennsylvanian invertebrates of the Mazon Creek area, Illinois : Eurypterida / Erik N. Kjellesvig-Waering --

v.12:no.6(1963)

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

v.12:no.4(1956)

Chesterian (Upper Mississippian) Gastropoda of the Illinois basin / [by] Myint Lwein Thein -- and Matthew H. Nitecki --.

v.34(1974)

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)

Arctoid genetic characters as related to the genus Parictis / [by] John Clark -- and Thomas E. Guensburg, University of Illinois. [Patricia M. Williams -- editor.]

v.26:no.1(1972)

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)