Cita APA

Heyl, A. v. 1., & Heyl, A. v. 1. (1964). Oxidized zinc deposits of the United States, part 3 Colorado: The geology of the known deposits and the resources of oxidized zinc ores in Colorado. Washington: U.S. Government Printing Office.

Citación estilo Chicago

Heyl, Allen van 1918-, y Allen van 1918- Heyl. Oxidized Zinc Deposits of the United States, Part 3 Colorado: The Geology of the Known Deposits and the Resources of Oxidized Zinc Ores in Colorado. Washington: U.S. Government Printing Office, 1964.

Cita MLA

Heyl, Allen van 1918-, y Allen van 1918- Heyl. Oxidized Zinc Deposits of the United States, Part 3 Colorado: The Geology of the Known Deposits and the Resources of Oxidized Zinc Ores in Colorado. Washington: U.S. Government Printing Office, 1964.