Digital line graphs from 1:24,000-scale maps.
Contributors: Geological Survey (U.S.)
Series: Data users guide -- 1.
Publisher: U.S. Dept. of the Interior, U.S. Geological Survey
Published: 1987
Place of publication: Reston, Va
Language: eng
Number of pages: 109
Subjects: Digital mapping -- Standards
Notes: "National Mapping Program technical instructions"--Cover.

"US GeoData"--Cover.