"Estatutos de la Compañía de Minas de la Blanca y Anexas," Sociedad Anónima : reformados con fundamento de los acuerdos tomados por la Asamblea General Extraordinaria de Accionistas celebrada el 12 de junio de 1912, y su sesión correlativa de Consejo de 12 de julio de 1912, Pachuca.

Mode of access: Internet.

Journeys of observation,

Mode of access: Internet.

Minas históricas de la República Mexicana; revista de las minas descubiertas en los tres ultimos siglos. Escrita con datos tomados de las obras de Humboldt, Ward, Burkart, Egloffstein ...

Mode of access: Internet.

Status of mineral resource information for assorted Indian lands in Nevada /

Bibliography: p. 123-135.

American railroad journal.

Imprint varies.

Preventing haloform formation in drinking water /

Mode of access: Internet.

Report.

Beginning with vol. 7 the date on the title page is a year later than the period covered by the report.

Minerals in 1991 /

Mode of access: Internet.

Memoria del Instituto Geológico y Minero de España.

Mode of access: Internet.

Bulletin.

Mode of access: Internet.

Geognostische Jahreshefte /

Mode of access: Internet.

Report.

None published 1913-1914, 1918-1919.

Fourteenth census of the United States taken in the year 1920 ... [Reports]

At head of title: Department of commerce. Bureau of the census ... Sam. L. Rogers, director. Resigned April 13, 1921. W. M. Steuart, director. Appointed April 14, 1921.

Economic papers.

No. 5 is Bulletin no. 1 of the Highway Commission.

Michigan's mineral industries.

None issued for 1919; 1920 includes data for 1919.