WITTGENSTEIN, L. Prototractatus. An early version of Tractatus logico-philosophicus. Ed. by B.F. McGuinness, T. Nyberg & G.H. v. Wright. (1971). 4°. Ocl. -- Id. Zettel. Ed. by G.E.M. Anscombe & G.H. v. Wright. 1967. Ocl. w. dust-j. -- Id. Cambridge letters. Correspondence with Russell, Keynes, Moore, Ramsey and Sraffa. (1995). Obrds. w. dust-j. -- Id. Remarks on colour / Bemerkungen über die Farben. Ed. by G.E.M. Anscombe. (1978). Obrds. w. dust-j. -- Id. Philosophical remarks. (1975). Obrds. w. dust-j. -- And 1 o. (6).