Published biographical information on Manfred Schaefer, Australian Socceroos, Australian Soccer Hall of Fame: Wikipedia website - Team photo 'Hamburg' (1973) - 'Spotlight on the Socceroos' (16th May, 2006) - 'Socceroo Internationals for 1972' by Thomas Esamie, Greg Stock & Jean Michel Cazal - World Cup West Germany on Nigel's Webspace (1974) - Sydney Morning Herald (20th November, 2003) - Daily Telegraph (13th December, 2003) - ABC Sports Online (19th April, 2006) - Sydney Morning Herald (12th May, 2006) - ABC Online (22nd June, 2006)
