'Fire Power' by Dave Tomkins and Chris Dempster 1978.
'Dirty Combat' by DaveTomkins 2008
'The Wages of War' by John banks 1978.
'Congo Mercenary' by Mike Hoare 1967.
'No Mean Soldier' by Peter McAleese 1993
'Guns For Hire' by Tony Geraghty 2007
'The New Mercenaries' by Anthony Mockler 1985.
'The Whores of War' by Wilfred Burchett & Derek Roebuck 1977.
Websites
www.publicintegrity.org
www.listverse.com
www.wikipedia.org
'Soldier of Fortune' USA magazine