Publication

1969 - U.S. Dept. of the Interior, Washington, District of Columbia

Language

English

Word Count

3,750 words, Guess

Page Count

15 pages

Identifiers

Classifications

  • DDC557.3/08 s
  • LCCQE75 .C5 no. 631

Subjects

Series Statement

  • Geological Survey circular 631
  • Geological Survey circular ;
  • 631.

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