Earth history field trip for high school science teachers
Subtitle: West Chicago, Illinois, Oct. 11, 1947
By: sponsored by State Geological Survey ; Gilbert O. Raasch, conference director
Publisher: State Geological Survey
Published: 1947
Place of publication: [Champaign, Ill.]
Language: eng
Subjects: Geology
Other titles: High school science teachers earth history field trip,  West Chicago, Illinois
Notes: Caption title.