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Books about Coertze:
Geslagsregister: Coertse, Coertsen, Coertze en Coertzen (Afrikaans Edition) by P. J Coertze (1984)
Wiki information Coertze:
Willem Coertzen is a South African track and field athlete who competes in the decathlon. He was the silver medallist in the event at the African Championships in Athletics in 2008. He is the current South African national record holder in the event...