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Letter to P. Catz
Letter to P. Catz
Manuscript (annex) missing. Annex: letter from J.B. Kelholt to Tinbergen.
Letter to F. Perroux
Letter to F. Perroux
Letter to J. Bierens de Haan
Letter to J. Bierens de Haan
Letter to Organisation for European Economic Co-operation
Letter to Organisation for European Economic Co-operation
Letter to P.C.J. van Hoboken
Letter to P.C.J. van Hoboken
Letter to H.J. Witteveen
Letter to H.J. Witteveen
Letter to J.M. den Uyl
Letter to J.M. den Uyl
Annex: manuscript of article for Socialisme en Democratie titled 'Rechtvaardigheid en solidariteit'.
Letter to L. Becker
Letter to L. Becker
Letter to T. Koopmans
Letter to T. Koopmans
Letter to G.A.Ph. Weyer
Letter to G.A.Ph. Weyer
Letter to R. Roy
Letter to R. Roy
Letter to I.C. Trafford
Letter to I.C. Trafford
Letter to L'Institut des Recherches Économiques et Sociales, Leuven
Letter to L'Institut des Recherches Économiques et Sociales, Leuven
Letter to J. Schuurbeque Boeije
Letter to J. Schuurbeque Boeije
Letter to P. Hennipman
Letter to P. Hennipman
Letter to Princeton University, New Jersey
Letter to Princeton University, New Jersey
Recommendation letter for J.L. Enos.
Letter to J.C. Blommers
Letter to J.C. Blommers
Letter to P.C. Mahalanobis
Letter to P.C. Mahalanobis
Letter to J.H. van Royen
Letter to J.H. van Royen
Letter to P. Hennipman
Letter to P. Hennipman
Letter to A. Koens
Letter to A. Koens
Letter to Adolfo Beria d'Argentine
Letter to Adolfo Beria d'Argentine
Letter to W. Polak
Letter to W. Polak
Letter to J.H.W. Hoogwater
Letter to J.H.W. Hoogwater
Letter to W.J. Baumol
Letter to W.J. Baumol