Allen, Robert Livingston. <br/><br/>
The verb system of present-day American English. 

 - Paris  Mouton & Co.  1966. 
 - 303 p.  illus. 
 - Janua linguarum. Series practica  24 .
<br/><br/>Bibliography: 274-303. 
<br/><br/><label>LCCN: </label>91009647 //r892 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--United States.<br/>English language--Verb.
<br/><br/><label>LC Class. No.: </label>PE2821  / .A4 
<br/><br/><label>Dewey Class. No.: </label>428.20973