Eugene Stanley Richardson

Pennsylvanian Invertebrates of the Mazon Creek Area, Illinois. Trilobitomorpha Arthropleurida

Pennsylvanian Invertebrates of the Mazon Creek Area, Illinois. Insects

Pennsylvanian Invertebrates of the Mazon Creek Area, Illinois : The Morphology and Affinities of Tullimonstrum

Pennsylvanian Invertebrates of the Mazon Creek Area, Illinois : The Essex Fauna and Medusae

Pennsylvanian Invertebrates of the Mazon Creek Area, Illinois