Blumenthal, Joseph C <br/><br/>
English 2600  a programed course in grammar and usage 
Joseph C. Blummenthal 
 - 3rd ed. 
 - Brace & World, New York  Harcourt  1969 
 - viii, 439 p. ; 23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Programmed instruction