Willy Hellpach
![Willy Hellpach by Elli Lisser, 1931](https://upload.wikimedia.org/wikipedia/commons/2/27/Willy_Hellpach_by_Elli_Lisser%2C_1931_%28crop%29.jpg)
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Published: [2020]
Superior document: Title is part of eBook package: De Gruyter DGBA Business and Economics <1990
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Published: [2021]
Superior document: Title is part of eBook package: De Gruyter DGBA Reference Works <1990
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