Honorary doctorates in Leuven (Belgium), 1967. Front row: (half face of François-Marie Braun)., W.A. Visser 't Hooft. Back row: Federigo Melis, Hans Ussing, Tjalling Koopmans, X.X.
Eric Koch (ANEFO)
<a rel="nofollow" class="external text" href="http://proxy.handle.net/10648/ab0e616e-d0b4-102d-bcf8-003048976d84">GaHetNa (Nationaal Archief NL)</a> 920-0376