Medieval town walls :  an archaeology and social history of urban defence / 
Oliver Creighton & Robert Higham. 
 - Stroud:   Tempus,   2005.  
 - 320 p. :  ill. (some col.) ;  25 cm. 
<br/><br/>Bibliographical references. p. 291-313. 
<br/><br/><label>ISBN: </label>0752414453 
<br/><br/><label>Subjects--Topical Terms: </label><br/>City walls--History--Great Britain
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Great Britain--History--Medieval period, 1066-1485