Contributions

  • Wilson, L. R. (Leonard Richard), 1906-1998, joint author - Contributor
  • Bentall, Ray, joint author - Contributor

Publication

1944 - Illinois State Geological Survey, Urbana, Illinois

Language

English

Word Count

18,000 words, Guess

Page Count

72 pages

Identifiers

Classifications

  • LCCQE915 .S34

Alternate Titles

  • Definition of generic groups.

Subjects

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