search query: @author Helfrich, I. / total: 1
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| title | year | author | ||
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Absatzwirtschaft
1995 : FEB, p. 58-59 |
1995 | Helfrich, I. |
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| title | year | author | ||
| 1. |
Absatzwirtschaft
1995 : FEB, p. 58-59 |
1995 | Helfrich, I. |