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Published online by Cambridge University Press: 11 October 2017
page 416 note 1. Cf., sur Morand, nos références, Annales, 1953, p. 383 (” Houillerie » liégeoise…).
page 416 note 2. Transactions of the American Philosophical Society. New séries, vol. 44, part 4, 1954 (Philadelphie, sept. 1954) ; in-4°, p. 427-538.