http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Radon-222 Content of natural gas samples from Upper and Middle Devonian sandstone and shale reservoirs in Pennsylvania
Title from title screen (viewed on Dec. 21, 2012).
Includes bibliographical references (pages 4-5).
U.S. Geological Survey open-file report ; 2012-1159