Proper study. 

 - London  Macmillan            1971 
 - xvi,236p.  cm. 
 - Royal institute of philosophy lecturs. 1969-1970 .
<br/><br/><label>Standard No.: </label>135492 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>R:(Y), L1