Ginsburg, Seymour. <br/><br/>
The mathematical theory of context free languages / 
by Seymour Ginsburg. 
 - New York, N.Y. :  McGraw-Hill,  1966. 
 - xii, 232 p. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computational linguistics.<br/>Technology--Computers and computer technology.<br/>Mathematics.