Eugene Stanley Richardson

• Pennsylvanian Invertebrates of the Mazon Creek Area, Illinois : The Morphology and Affinities of Tullimonstrum
• Pennsylvanian Invertebrates of the Mazon Creek Area, Illinois. Insects
• Pennsylvanian Invertebrates of the Mazon Creek Area, Illinois. Trilobitomorpha Arthropleurida
• Pennsylvanian Invertebrates of the Mazon Creek Area, Illinois
• Pennsylvanian Invertebrates of the Mazon Creek Area, Illinois : The Essex Fauna and Medusae