Author

Contributions

  • Puerto Rico. Dept. of Industrial Research. - Contributor

Publication

1971 - U.S. Govt. Print. Off., Washington, District of Columbia

Language

English

Word Count

25,500 words, Guess

Page Count

102 pages

Identifiers

Classifications

  • DDC557.295
  • LCCQE225 .G56

Subjects

Topics

Places

Series Statement

  • Geological Survey professional paper ; 636
  • Geological Survey professional paper ;
  • 636.

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