http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Occurrence and significance of marine animal remains in American coal balls
pages 193-224 : illustrations, plates. ; 29 cm.
"A description of intermixtures of marine animals and land plants occurring in coal balls in Illinois, Iowa, Kansas, and Oklahoma."
Includes bibliographical references and index.
Professional paper (Geological Survey (U.S.)) ; 354-I
Shorter contributions to general geology