search query: @author Heijke, J.A.M. / total: 1
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title | year | author | ||
1. |
Economisch Statistische Berichte
1990 : MAY 9, VOL. 75:3756, p. 428-432 |
1990 | Grip, A. de Heijke, J.A.M. Dekker, R.J.P. |
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