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1

December 1951

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Vergara,

Dr JosI Vergara,
Blbllotheca de la Ciencla
Economlca,
Barbara de Braganza 12,
Madrid.

examlnatïonrthlif
n^cessIJv ''WiZ^''^''
"^'"^^«
«" further
^^^^^^
change.
necessary.
I hope you agree
to ^'
this
Yours very sincerely,
For }lv Tinbergen

(secretary)

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