found: African historiography, c1985:CIP title page (Bogumil Jewsiewicki)
found: Etat indépendant du Congo, Congo belge, République démocratique du Congo, République du Zaïre? 1984:title page (B. Jewsiewicki) p. 103 (Bogumil Jewsiewicki)
found: Histoire économique d'une ville coloniale, Kisangani, 1978:title page (Bogumil Jewsiecki)
found: Gould, D.J. From development administration to underdevelopment administration, 1978:leaf 40 (Jewsiewicki Bogumil Jacek, cited as author of Histoire économique d'une ville coloniale, Kisangani)
found: Bibliothèque nationale de France, Feb. 1, 2013(hdg.: Jewsiewicki, Bogumil Koss ; nat.: Polish ; Historian, professor at Laval University, Quebec; holder of the Canada research chair in Comparative History of Memory; member of the African Studies Center at École des hautes études en sciences sociales)
found: Universitatea din Bucureşti Website, Apr. 23, 2013(Tob UB Revista online a Universitatu din Bucureşti, Sept. 2006: The University of Bucarest University awarded the title of Doctor Honoris Causa to Canadian Professor, Bogumil Jewsiewicki KOSS; born in Vilnius, Lithuania in 1942)