^"Compagnie Aerienne Des Grands Lacs (Cagl); Great Lakes Business Company (GLBC) on United Nations".
^Harms 1975, p. 78.
Bibliography
Harms, Robert (1975), "The End of Red Rubber: A Reassessment", The Journal of African History, 16 (1): 73–88, doi:10.1017/S0021853700014110, JSTOR 181099