Langer, Susanne Katherina ( Kauth)  1895- <br/><br/>
An introduction to symbolic logic / 
Susanne Katherina ( Kauth) La nger 
 - London :  Allen & Unwin ,  1937. 
 - 363p. :  ill. ;  23cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic, Symbolic and mathematical
<br/><br/><label>Dewey Class. No.: </label>511.3