Author

Contributions

  • Blackwelder, Blake W., joint author. - Contributor

Publication

1975 - U.S. Govt. Print. Off., Washington, District of Columbia

Language

English

Word Count

6,000 words, Guess

Page Count

24 pages

Identifiers

Classifications

  • DDC564/.11
  • LCCQE812.P4 W37

Subjects

Series Statement

  • Geological Survey professional paper ; 861
  • Geological Survey professional paper ;
  • 861.

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