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Hellwig, Günter, 1926- (Personal Name)
LCCN 64-16795: His Differentialoperatoren ... 1964 (hdg.: Hellwig, GÌunter, 1926- )
LC data base, 6-14-84 (hdg.: Hellwig, GÌunter, 1926- ; usage: GÌunter Hellwig)