Leech, Geoffrey <br/><br/>
Word frequencies in written and spoken English 
Geoffrey Leech, Paul Rayson and Andrew Wilson 
 - London:  Pearson Education Limited,  2001. 
 - vi, 304p. 
<br/><br/><label>ISBN: </label>0582320070 
<br/><br/><label>Dewey Class. No.: </label>415