Longman Language Activator :  Тhe World's First Production Dictionary /. 

 - Harlow, Essex :  Longman,  1997. 
 - 1587 p. ;  25 cm. 
 - Longman dictionaries .
<br/><br/><label>ISBN: </label>0-582-04093-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>languages ​​of the World