Malcolm, Norman. <br/><br/>
Ludwig Wittgenstein : A Memoir /  

 - Second Ed. /  
 - Oxford OX2 6DP :   Oxford Univesity Press ,   1985 
 - p.136 :  
<br/><br/><label>ISBN: </label>0-19-283042-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Philosophy
<br/><br/><label>Dewey Class. No.: </label>RwM89  / M4