Wittgenstein, Ludwig <br/><br/>
The Blue and Brown books.  Preliminary studies for the "Philosophical investigations" 
generally known as the Blue and Brown books. 
 - New York  Harper  [1964, c1958] 
 - xiv, 185 p.  illus.  22 cm. 
<br/><br/> "Second edition." 
<br/><br/><label>LCCN: </label>nuc67010883  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Philosophy--Studies and investigations.