Butler, L. J. <br/><br/>
Clifford's Tower and the castles of York / 
Lawrence Butler. 
 - London :  English Heritage,  1997. 
 - 24p. 
<br/><br/><label>ISBN: </label>1850746737 
<br/><br/><label>Subjects--Corporate Names: </label><br/>Clifford's Tower, (York, England)
<br/><br/><label>Subjects--Topical Terms: </label><br/>York Castle.<br/>Castles--England--York.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>York (England)--History.