MARITA KOCH East German Athlete in athletics after she wonn 400m at European Championship in the Athena 1982 Stock Photo - Alamy
Marita Koch: Can we believe her 400m world record is genuine? - BBC Sport
Enduring Shame: Marita Koch and the GDR | the runner eclectic
BBC Sport on Twitter: "30 years on, Marita Koch's unbroken 400m world record is still a hot topic. Was it genuine? http://t.co/BrV7nrDldP http://t.co/qr1nexoNne" / Twitter