Cannel coal in the United States
By: by George H. Ashley.
Series: Geological Survey bulletin -- 659
Publisher: Govt. Print. Off.
Published: 1918
Place of publication: Washington
Language: eng
Number of pages: 127
Subjects: Cannel coal -- United States.; Coal -- Geology -- United States.; Coal mines and mining -- United States.; Coal reserves -- United States.
Notes: Includes bibliographical references and index.