Operating regulations to govern coal-mining methods and the safety and welfare of miners
Subtitle: on leased lands on the public domain under the act of February 25, 1920 (41 Stat. 437) and amendments thereto.
Edition: Second edition.
Publisher: U.S. Govt. print. off.
Published: 1938
Place of publication: Washington
Language: eng
Number of pages: 46
Subjects: Coal mines and mining -- United States.; Coal mines and mining -- Safety measures.; Public lands -- United States.; Mining law -- United States.
Notes: At head of title: United States Department of the interior.