APA (7th ed.) Citation

Geological Survey (U.S.). (1938). Brown iron ores of eastern Texas. [s.n.].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Brown Iron Ores of Eastern Texas. [Washington]: [s.n.], 1938.

MLA (9th ed.) Citation

Geological Survey (U.S.). Brown Iron Ores of Eastern Texas. [s.n.], 1938.