BPI SearchArchived March 15, 2015, at the Wayback Machine bpi.co.uk. The user must do a search for: Artist: "Soundgarden" and exact match. retrieved August 13, 2017
BPI SearchArchived March 15, 2015, at the Wayback Machine bpi.co.uk. The user must do a search for: Artist: "Soundgarden" and exact match. retrieved August 13, 2017