Virginia Klenk <br/><br/>
Understanding symbolic logic/ 
by Virginia Klenk. 
 - 2nd. 
 - New Jersey:  Prentice-Hall,  1989. 
 - 433p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic Symbolic
<br/><br/><label>Dewey Class. No.: </label>160  / VIR/U