Cita APA

U.S. Geological Survey. Mineral industry surveys , copper in april 2006.

Citación estilo Chicago

U.S. Geological Survey. Mineral Industry Surveys , Copper in April 2006.

Cita MLA

U.S. Geological Survey. Mineral Industry Surveys , Copper in April 2006.

Warning: These citations may not always be 100% accurate.