U.S. Geological Survey information sources.
Contributors: Geological Survey (U.S.)
Series: USGS fact sheet -- 057-99.; Fact sheet (Geological Survey (U.S.)) -- FS 99-57.
Publisher: U.S. Dept. of the Interior, U.S. Geological Survey
Published: 1999
Place of publication: [Reston, Va.?]
Language: eng
Subjects: Geological Survey (U.S.) -- Information services.
Notes: Caption title.

Shipping list no.: 99-0191-P.