http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
data entry, retrieval, and update for the National Coal Resources Data System (phase I)
1 online resource (iii, 107 pages) : illustrations, map.
Title from title screen (viewed October 2, 2014).
"A set of programs, written in FORTRAN IV, which extends the capability of GRASP and which has been developed in response to the need for a computer-based National Coal Resources Data System."
Includes bibliographical references (page 36).
Geological Survey professional paper ; 978