Coal resources of the United States, January 1, 1967
Series: Geological Survey bulletin 1275; Geological Survey bulletin ;; 1275.
Publisher: U.S. Govt. Print. Off.
Published: 1969
Place of publication: Washington
Language: eng
Number of pages: 116
Subjects: Coal -- United States.
Notes: Bibliography: p. 101-112.
"Supersedes Bulletin 1136."