Popper, Karl R. <br/><br/>
Conjecture and refutations : the growth of scientific knowledge/ 
by Karl R. Popper. 
 - 4th ed. 
 - London:  Routledge and Kagan Paul,  1972. 
 - xiii,431p.;   24cm. 
<br/><br/> Includes Index. 
<br/><br/><label>ISBN: </label>0710065086 
<br/><br/><label>Dewey Class. No.: </label>121  / POP