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Letter to W.A. Jöhr
Letter to W.A. Jöhr
Letter to P. Fortunati
Letter to P. Fortunati
Annex: short biograhphical resume of Tinbergen.
Letter to D.D. Fowler
Letter to D.D. Fowler
Letter to N.A. van Duyvendijk
Letter to N.A. van Duyvendijk
Letter to M.A.M.G. van Beusekom
Letter to M.A.M.G. van Beusekom
Letter to W. van Andringa de Kempenaer
Letter to W. van Andringa de Kempenaer
Letter to S. Jelsma
Letter to S. Jelsma
Letter to R. Mossè
Letter to R. Mossè
Letter to S. Posthuma
Letter to S. Posthuma
Letter to R. Triffin
Letter to R. Triffin
Letter to Societe d'Économie Politique de Belgique
Letter to Societe d'Économie Politique de Belgique
Letter to Haags Montessori Lyceum
Letter to Haags Montessori Lyceum
Letter to Richard Stone
Letter to Richard Stone
Letter to J.A. Monod de Froideville
Letter to J.A. Monod de Froideville
Letter to Levensverzekering-Maatschappij N.O.G.
Letter to Levensverzekering-Maatschappij N.O.G.
Letter to R. Haus
Letter to R. Haus
Letter to I.P. de Vooys
Letter to I.P. de Vooys
Letter to J. van der Toorn
Letter to J. van der Toorn
Letter to Mulder
Letter to Mulder
Letter to E.B.F.R.G. Wittert van Hoogland
Letter to E.B.F.R.G. Wittert van Hoogland
Letter to I.C. Trafford
Letter to I.C. Trafford
Letter to M.B. Amzalak
Letter to M.B. Amzalak
Letter to H. Staehle
Letter to H. Staehle
Letter to Fritz Neumark
Letter to Fritz Neumark
Letter to G. Gonggrijp
Letter to G. Gonggrijp