Miscellanea historica in honorem Leonis van der Essen : universitatis catholicae in oppido Lovaniensi iam annos XXXV professoris. - Van der Essen, Léon, 1883-1963 (Brussel : Éditions universitaires, 1947)
Keywords: World history -- Addresses, essays, lectures; Netherlands -- History -- Addresses, essays, lectures