Beekmantown group
Subtitle: Lower Ordovician, of Maryland.
Publisher: Geological Society of America]
Published: 1957
Place of publication: [New York
Language: eng
Number of pages: 161
Subjects: Geology, Stratigraphic -- Ordovician.; Paleontology -- Ordovician.; Geology -- Maryland -- Washington County.; Paleontology -- Maryland -- Washington County.
Notes: Bibliography: p. 138-141.