Fries, C., & Schmitter, E. (1948). Tin-bearing placers near Guadalcazar, State of San Luis Potosi, Mexico. United States Department of the Interior, Geological Survey.
Chicago Style (17th ed.) CitationFries, Carl, and Eduardo Schmitter. Tin-bearing Placers Near Guadalcazar, State of San Luis Potosi, Mexico. [Washington, D.C.]: United States Department of the Interior, Geological Survey, 1948.
MLA (9th ed.) CitationFries, Carl, and Eduardo Schmitter. Tin-bearing Placers Near Guadalcazar, State of San Luis Potosi, Mexico. United States Department of the Interior, Geological Survey, 1948.
Warning: These citations may not always be 100% accurate.