Alexander,L.G. <br/><br/>
Practice and progress  : V.1 
/ L.G. Alexander 
. - Harlow  : Longman, 1985
. - [76 p.  ; 28 cm. 
<br/><br/><label>ISBN: </label>0582927056 
<br/><br/><label>Source: </label> don britannique 
<br/><br/><label>Universal Decimal Class. No.: </label>802.0.