Contributions

  • Riley, L. B. 1905- joint author. - Contributor
  • Haffty, Joseph, 1923- joint author. - Contributor

Publication

1969 - U.S. Geological Survey, Washington, District of Columbia

Language

English

Word Count

3,000 words, Guess

Page Count

12 pages

Identifiers

Classifications

  • DDC557.3/08 s
  • LCCQE75 .C5 no. 624

Subjects

Series Statement

  • Geological Survey circular
  • 624

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