Simon, Gérard, 1931; <highlight>International Congress on the History of Sciences (20th : 1997 : Liège, Belgium</highlight>; <highlight>International Congress on the History of Sciences (20th : 1997 : Liège, Belgium)</highlight>. Proceedings <highlight>of the</highlight> XXth <highlight>International Congress of History of</highlight> Science (Liège, 20-26 July 1997) ; v. 12.; Débarbat, Suzanne.; Simon, Gérard, 1931-; Simon, Gérard, 1931; Débarbat, Suzanne.; Simon, Gérard, 1931-