http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Map of the brown coal and lignite area of Texas
compiled by E.T. Dumble, state geologist.
Detached from: Report on the brown coal and lignite of Texas : character, formation, occurrence, and fuel uses / by Edwin T. Dumble
Report on the brown coal and lignite of Texas