Documentation of data format and content to accompany magnetic tape copies of various data files of the National Coal Resources Data System (NCRDS)--ECOAL, WCOAL, NEWCOAL, BMALYT, and USCHEM
By: by M. Devereux Carter, Antoinette L. Medlin, and Kathleen K. Krohn
Contributors: Medlin, Antoinette L; Krohn, Kathleen K; Geological Survey (U.S.)
Series: Open-file report -- 81-1079; Open-file report (Geological Survey (U.S.)) -- 81-1079
Publisher: U.S. Dept.of the Interior, U. S. Geological Survey
Published: 1981
Place of publication: [Reston, Va.?]
Language: eng
Format: Microform
Subjects: Coal -- Data processing; Information storage and retrieval systems -- Mines and mineral resources
Notes: Microfiche. [Denver, Colo. : U.S. Geological Survey, 1981?]. 1 microfiche ; 11 x 15 cm

Bibliography: p. 32