"Remove Tarnish from Silver". scifun.chem.wisc.edu. Department of Chemistry, University of Wisconsin-Madison. Archived from the original on 2018-04-01. Retrieved 2012-10-19.
"Remove Tarnish from Silver". scifun.chem.wisc.edu. Department of Chemistry, University of Wisconsin-Madison. Archived from the original on 2018-04-01. Retrieved 2012-10-19.