Why study geology: covering old and new ground
Subtitle: [Radio address presented ... August 7, 1947]
Series: Illinois State Geological Survey. Circular -- no. 140; Circular (Illinois State Geological Survey) -- no. 140.; Circular (Illinois State Geological Survey) -- 140.
Published: 1948
Place of publication: Urbana
Language: eng
Number of pages: 39
Subjects: Geology
Other titles: Covering old and new ground.
Notes: "Reprinted from School science and mathematics, vol. XLVIII, no. 1, 1948."