Geology of the Freeport quadrangle, Illinois
By: [by] F. L. Doyle.
Published: 1965
Place of publication: Urbana
Language: eng
Number of pages: 24
Subjects: Geology -- Illinois -- Stephenson County
Notes: Bibliography: p. 23-24.
Cover title.
"A longer report on this research was presented as partial requirement for the degree of doctor of philosophy in geology at the University of Illinois."