Author

Contributions

  • Willman, Harold Bowen, joint author - Contributor

Publication

1931 - Printed by authority of the State of Illinois, Urbana, Ill, Illinois

Language

English

Word Count

6,500 words, Guess

Page Count

26 pages

Identifiers

Classifications

  • DDC557.73
  • LCCQE105 .A25 no.23

Subjects

Topics

Places

Series Statement

  • Illinois. State geological survey. Report of investigations -- no. 23

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