United States. Department of the Interior. Office of the Secretary. (1906). Compilation of correspondence and statistical data from records and files of Department of Interior in relation to coal lands in Indian Territory, acreage and approximate value thereof, thickness of various veins of coal, et cetera, Mar. 27, 1906 to June 30, 1906. US GPO.
Chicago Style (17th ed.) CitationUnited States. Department of the Interior. Office of the Secretary. Compilation of Correspondence and Statistical Data from Records and Files of Department of Interior in Relation to Coal Lands in Indian Territory, Acreage and Approximate Value Thereof, Thickness of Various Veins of Coal, Et Cetera, Mar. 27, 1906 to June 30, 1906. Washington, D.C.: US GPO, 1906.
MLA (9th ed.) CitationUnited States. Department of the Interior. Office of the Secretary. Compilation of Correspondence and Statistical Data from Records and Files of Department of Interior in Relation to Coal Lands in Indian Territory, Acreage and Approximate Value Thereof, Thickness of Various Veins of Coal, Et Cetera, Mar. 27, 1906 to June 30, 1906. US GPO, 1906.