Catalog of the Egan collection of Silurian invertebrate fossils at the Chicago Academy of Sciences. - Chicago Academy of Sciences. [from old catalog]; Ball, John Rice 1881- [from old catalog].; Greacen, Katherine Fielding 1913- [from old catalog]. (Chicago The Chicago Academy of Sciences, 1946)
Keywords: Egan, William Constantine -- 1841-1930. [from old catalog].; Invertebrates, Fossil; Paleontology -- Silurian; Paleontology -- United States