The
Rock River country of northern Illinois
Rolfe, Deette, 1879-
creator
text
ilu
Urbana, Ill
Springfield
Jeffersons Printing & Stationery Co.]
1929
monographic
eng
[58], [1] p. incl. front. illus., maps. 20 cm.
by Deette Rolfe.
At head of title: State of Illinois. Department of Registration and Education.
Bibliography: p. [59]
Geology
Illinois
Rock River Valley
QE105 .A3 no.2
gs 29000068
U. S. Geol. Survey. Libr.
820714
20260227111333.0
gs 29000068