Contribution à l'histoire de la pétrologie des charbons. Naissance du Comité International de Pétrologie des Charbons et de son lexique

Duparque, 1933, Structure microscopique des charbons du bassin houiller du Nord et du Pas de Calais, Mem. Soc. Géol. Nord, 11, 756 Jemtschujnikow, 1932-1952, Introduction into the petrography of coal, 41 Roos, 1935, Comparative researches on the variation of the constituents of coal of one seam form South Limburg, 99 Stach, 1935, Lehrbuch der Kohlenpetrographie, 293 Stevenson, 1911, The formation of coal beds Stopes, 1919, On the four visible ingredients in banded bituminous coal, 90, 470 Stopes, 1924, The constitution of coal, 3, Fuel, 3, 179 Stopes, 1924, The constitution of coal, 3, Fuel, 3, 196 Withham, 1932, On the general results of botanical investigation concerning the character of the ancient flora which by its composition has furnished the material of coal seams, 78