Wilder, Raymond Louis, 1896- <br/><br/>
Introduction to the foundations of mathematics / 
Raymond L. Wilder 
 - 2nd ed. 
 - New York :  John Wiley & Sons,  1965 
 - xvi, 327 p. :  24 cm. 
<br/><br/>p. 301-313. 
<br/><br/><label>ISBN: </label>0471944157 
<br/><br/><label>LCCN: </label>65-016428 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Philosophy<br/>Logic, Symbolic and mathematical