Swan, Michael <br/><br/>
Spectrum:  an anthology of English varieties for intermediate and more advanced students/ 
Michael Swan. 
 - Cambridge:  Cambridge University Press,  1978. 
 - 195 pages:  illustrations;  20cm. 
 - Cambridge English language learning  6 .
<br/><br/><label>ISBN: </label>0521216222 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Rhetoric.<br/>English language--Usage.