search query: @author Wittman, R. / total: 4
references: 4-4 / 4
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| title | year | author | ||
| 4. |
UWF-Umweltwirtschaftsforum
1996 : SEP, VOL. 4:3, p. 72-77 |
1996 | Baum, H-G. Sturm, A. Wittman, R. |
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