search query: @author Niggemann, R. / total: 4
references: 3-4 / 4
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title | year | author | ||
3. |
Marketing Journal
1981 : MAR/APR, VOL. 14:2, p. 138, 140 |
1981 | Niggemann, R. |
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4. |
Marketing Journal
1980 : DEC, VOL. 13:6, p. 572, 574 |
1980 | Niggemann, R. |
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