Marita Koch East Germany 400m European Editorial Stock Photo - Stock Image | Shutterstock Editorial
Women's Athletics World Records
Marita Koch: Greatest 400m runner unconquerable even after 36 years | Sunday Observer
400-meter upset winner at worlds suspended in doping case - CGTN
Marita Koch - Wikipedia
Marita Koch 400m dash | Athletisme, Célébrités
Leichtathletik: DDR steht hier noch immer an der Spitze
W 400m - Marita Koch - 47.60 - Canberra (Aus) - 1985 - World Record - YouTube
Marita Koch East Germany 400m Final Editorial Stock Photo - Stock Image | Shutterstock Editorial
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
Marita Koch: Can we believe her 400m world record is genuine? - BBC Sport