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Books about Nickau:
AMMONII [AMMONIUS]: QUI DICITUR LIBER DE ADFINIUM VOCABULORUM DIFFERENTIA Edidit Klaus Nickau by Ammonius (1966)
Sports Illustrated "Jack Nickaus" Vol.34 No.10 1971 by Sports Illustrated (1971)
Wiki information Nickau:
Richard Nickau was a father of Erika Nymgau-Odemar.