• publisher: Govt. print. off.
  • creator: Edward Wheeler Parker , Geological Survey (U .S.), Geological Survey (U.S.
  • contributor: Library of Congress
  • mediatype: texts
  • years: 1908
  • pages: 67
  • language: English
  • notes: At head of title: Department of the interior--U.S. Geological survey. George Otis Smith, director.
  • download: pdf file