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Copies of most U.S. Geological Survey reports may now be purchased by mail from a single centrally located facility at Denver, Colorado. Previously, copies of USGS open file reports were made available for public inspection only, or copies could be obtained at purchaser's expense, not by mail, only at designated Survey libraries, public inquiries offices, or other facilities.

USGS open file reports may be ordered from the Open-File Services Section, Branch of Distribution, U.S. Geological Survey, Box 25425, Federal Center, Denver, Colorado 80225 (phone: 303-234-5888).