Das, Ramaprasad <br/><br/>
Logic of truth-functions : an introduction to  symbolic logic 
<label>/ by </label> Das, Ramaprasad 
 - Calcutta  Firma K.L.Mukhopadhyay  1964 
 - xix,368p. 
<br/><br/>L 
<br/><br/><label>Dewey Class. No.: </label>164  / D