Alexander,L.G <br/><br/>
Mainline  : a functional national approach; progress b; teacher's book 
/ L.G. Alexander 
. - new ed. 
. - London  : Longman, c1981
. - 126 p.  ; 22 cm. 
<br/><br/>index 
<br/><br/><label>ISBN: </label>0582515416 
<br/><br/><label>Source: </label> Don britannique 
<br/><br/><label>Universal Decimal Class. No.: </label>802.0.