€ 54,00
VIII,709 p. Cloth (Reprint edition Lpz. 1921/23) (Cover spotted)
Darmstadt, WB, 1971.
grundfragen 1971
Namur, Wesmael-Charlier, 1955.
Oxford, Clarendon Press, (1966).
Paris, Les Belles Lettres, 1925.
Paris 1958.