search query: @author Lammers, J. G. M. / total: 1
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| title | year | author | ||
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Economisch Statistische Berichte
1987 : SEP 23, VOL. 72:3624, p. 880-883, 888 |
1987 | Koelman, J. B. J. Lammers, J. G. M. |
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