Wittgenstein, Ludwig 1889-1951.
Letters to Russell, Keynes, and Moore /
Ludwig Wittgenstein ; edited with an introduction by G.H. von Wright, assisted by B.F. McGuinness 
. - Oxford : Basil Blackwell,  1974 
. - 190 p.  23 cm. 
<br/><label>  ISBN: </label>0-631-15180-X 
<br/><br/><label>Subjects--Personal Names: </label><br/>Russell, Bertrand 1872-1970 <br/>Keynes, John Maynard 1883-1946 <br/>Moore, George Edward 1873-1958