Author

Contributions

  • Ward, Lauck W. - Contributor

Publication

1993 - U.S. G.P.O., Washington, District of Columbia

Language

English

Word Count

20,250 words, Guess

Page Count

81 pages

Identifiers

Classifications

  • DDC551.7/7/0975
  • LCCQE688 .P62 1993

Subjects

Series Statement

  • U.S. Geological Survey professional paper ;
  • 1542

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