€ 23,00
XVI,267 p. Wrappers 25 cm (Replaces the thesis of 1941, which contained only the first 3 (of 5) chapters)
Amst., Paris, 1943.
lukrez 1943
Groningen, Batavia, Wolters, 1944.
Oxford, Clarendon Press, (1966).
Paris, Les Belles Lettres, 1925.
Paris 1958.
