Bibliography

Science focus 4 textbook
http://science.howstuffworks.com/copper-info4.htm
http://ibchem.com/IB/ibnotes/full/red_htm/19.3.htm
http://www.elmhurst.edu/~chm/vchembook/336electrorefine.html
http://www.australianminesatlas.gov.au/education/fact_sheets/copper.html