Reading and thinking in english :  exploring functions. 

 - Oxford :  Oxford University Press,  1981. 
<br/><br/><label>ISBN: </label>019451353X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inglés
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Libro
<br/><br/><label>Universal Decimal Class. No.: </label>802.0-07