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PROF. DR J. TINBERGEN

THE HAGUE, 26 August 1950
Sijzenlaan ^-1
Mr Eunice Stevens,
Associate Editor
The Blakiston Co'npany,
1012 Walnut Street
Philadelphia 5

Dear Mr Stevens,
Enclosed I am sending you a very short bibliograpjiy
which I think is sufficient; on the one hand my booklet is only
meant as a guidej and on the other hand the text-books mentioned
in this bibliography give all further references needed.
Yours very sincerely.

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