La solución del problema de la vida, 1964: title page (Lelotte Fernand)

Radostný pohled do života: title page (F. Lelotte, S.J.)

Diccionario histórico de la de la Compañía de Jesús,2001: Volume 3, page 2358 (dictionary heading: Lelotte, Fernand; educator and writer; born 15 March 1902 in Verviers, Belgium; died 7 May 1979 in Brussels; entered Jesuit order in 1921; ordained on August 24, 1933 in Louvain; final vows in 1936; wrote works on the Church and contemporary problems, chief among them the book La solution au problème de la vie (1947); founder of the journal Foyer Notre-Dame; lectured in Iron Curtain countries)