search query: @author Koelman, J. B. J. / total: 4
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| title | year | author | ||
| 4. |
Economisch Statistische Berichte
1986 : NOV 12, VOL. 71:3581, p. 1098-1102 |
1986 | Koelman, J. B. J. Vught, F. A. van |
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