News & CommentScientific Events

THE TWENTY-FIFTH ANNIVERSARY OF THE ILLINOIS STATE GEOLOGICAL SURVEY

See allHide authors and affiliations

Science  25 Apr 1930:
Vol. 71, Issue 1843, pp. 431
DOI: 10.1126/science.71.1843.431

This is a PDF-only article. The first page of the PDF of this article appears below.

PDF extract preview