Dear Sir,
./ith reference to your letter of i^rch
28 1953 to Professor Tl
on I can give
you the titles of two puwj.x^-ationsi
1. G. van Duyn, Central PL
^u
Monographs i.u. i} xuv- consequenoos of the introductlor
of unüxaoloy^-ient insurance,
The Hague 1952.
2. J.Tinbergen, On the theory of econoxaic
policy, Aiosterdaia 1952.
The cionograph of &ïr van Duyn I am sencling you under separate cover. The second
t)Ook is edited by the
.ae Uitgevers -'•aatschapDij, Aa;,-^....^.. *-- price is
Dfl. 6.50.
Yours sincerely,
