National Coal Quality Inventory (NaCQI) and U.S. Geological Survey coal quality databases.

Bibliographic Details
Corporate Author:	Geological Survey (U.S.)
Format:	Government Document Book
Language:	English
Published:	[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, [1999]
Series:	Fact sheet (Geological Survey (U.S.)) ; FS-99-120.
Subjects:	Coal > United States > Data processing.
Online Access:	https://purl.fdlp.gov/GPO/LPS50698

Description
Item Description:	Title from title screen (viewed on June 24, 2004). "May 1999." Electronic resource.
Physical Description:	2 unnumbered pages : digital, PDF file.
Format:	Mode of access: Internet from the USGS web site. Address as of 6/24/04: http://pubs.usgs.gov/fs/fs-0120-99/fs-0120-99.pdf ; current access is available via PURL.
Bibliography:	Includes bibliographical references.