Editing Copper extraction (section)

==External links==
* [https://www.copper.org/ Copper.org]
* {{cite web
  |url=http://mazamascience.com/Minerals/USGS
  |title=US Minerals Databrowser
  |publisher=[[Mazama Science]]
  |access-date=25 March 2010
  |archive-url=https://web.archive.org/web/20110311113613/http://mazamascience.com/Minerals/USGS/
  |archive-date=11 March 2011
  }}
* {{cite journal|title=Metal Stocks and Sustainability |author=R. B. Gordon*, M. Bertram and T. E. Graedel |journal=[[Proceedings of the National Academy of Sciences]] |publisher= [[National Academy of Sciences|U.S. National Academy of Sciences]] |date=31 January 2006 |pages= 1209–1214 |volume=103 |doi=10.1073/pnas.0509498103 |issue=5 |pmid=16432205 |pmc=1360560|bibcode = 2006PNAS..103.1209G |doi-access=free }}
{{AmCyc Poster|Copper Smelting}}
* The Copper Development Association's [http://www.copper.org/education/production.html copper production] {{Webarchive|url=https://web.archive.org/web/20130907132645/http://www.copper.org/education/production.html |date=2013-09-07 }} page.
* [https://web.archive.org/web/20170505133358/http://www.istc.illinois.edu/info/library_docs/manuals/primmetals/chapter5.htm Copper Processing], from an online text on metals, Illinois Sustainable Technology Center, [[University of Illinois]], archived in May 2017
* [https://web.archive.org/web/20080302034606/http://www.npi.gov.au/database/substance-info/profiles/27.html National Pollutant Inventory – Copper and copper compounds fact sheet]
* University of Pittsburgh School of Engineering Chemical and Petroleum Engineering Department, [http://www.engr.pitt.edu/chemical/undergrad/lab_manuals/flotation.pdf Froth Flotation] {{Webarchive|url=https://web.archive.org/web/20051206091734/http://www.engr.pitt.edu/chemical/undergrad/lab_manuals/flotation.pdf |date=2005-12-06 }} Lab notes.
* [http://chemconnections.org/modules/copper/ Copper Mine], college course syllabus, emphasis on chemistry, last updated 2000