search query: @author Helfrich, Christian / total: 4
references: 3-4 / 4
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title | year | author | ||
3. |
IO Management-Zeitschrift industrielle Organisation
1994 : VOL. 63:12, p. 78-80 |
1994 | Helfrich, Christian |
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4. |
IO Management-Zeitschrift industrielle Organisation
1990 : VOL. 59:10, p. 50-53 |
1990 | Helfrich, Christian |
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