search query: @author Elfring, T. / total: 5
references: 4-5 / 5
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title | year | author | ||
4. |
Economisch Statistische Berichte
1989 : AUG 2, VOL. 74:3718, p. 736-740 |
1989 | Elfring, T. Kloosterman, R. C. |
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5. |
Economisch Statistische Berichte
1989 : APR 5, VOL. 74:3701, p. 342-346 |
1989 | Elfring, T. |
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