Fossil wood and lignite of the Potomac Formation
By: by Frank Hall Knowlton.
Series: Bulletin of the United States Geological Survey -- no. 56; Geological Survey bulletin -- 56.
Publisher: Govt. Print. Off.
Published: 1889
Place of publication: Washington
Language: eng
Number of pages: 72
Subjects: Lignite.; Paleobotany -- Cretaceous.; Paleobotany -- United States.; Paleobotany -- Research -- United States.; Trees, Fossil -- United States.; Trees, Fossil -- Research -- United States.; Plants, Fossil -- United States.; Plants, Fossil -- Research -- United States.
Notes: Includes bibliographical references and index.