Some fossil plant types of Illinois
Subtitle: a restudy of the Lesquereux types in the Worthen collection of the Illinois State Mmuseum, augmented by descriptions of new species from Mazon Creek ...
By: by Raymond E. Janssen ..
Contributors: Illinois. State Museum, Springfield. Worthen Collection
Published: 1940
Place of publication: [Springfield, Ill
Language: eng
Number of pages: 124
Subjects: Lesquereux, Leo, -- 1806-1889; Paleobotany -- Illinois
Other titles: Fossil plant types of Illinois
Notes: Plates accompanied by 15 leaves of descriptive letterpress, not included in paging

"Private edition, distributed by the University of Chicago libraries, Chicago, Illinois."

"Reprinted from Scientific Papers, vol. I, Illinois State Museum, March, 1940."

Thesis (PH. D.)--University of Chicago, 1939

Bibliography: p. 105-116