McClain, William E., Loy R. Phillippe, and John E. Ebinger
Floristic Assessment of Foley Sand Prairie Nature Preserve, Lee County, Illinois
Visible Color Effects in a Positive Ray Tube Containing Helium Author: Knipp, Chas T.
The Physical History of the Upper Mississippi Valley During the Late Paleozoic Author: Van Tuyl, Francis M.
The Thebes Sandstone and Orchard Creek Shale and Their Faunas in Illinois Author: Blackwelder, Eliot
Visible Color Effects in a Positive Ray Tube Containing Helium Author: Knipp, Chas T.
The Physical History of the Upper Mississippi Valley During the Late Paleozoic Author: Van Tuyl, Francis M.