Duffy, Christopher <br/><br/>
Siege warfare: the fortress in the eearly modern world 1494-1660. 
Christopher Duffy 
 - London  Routledge and Kegan Paul  1979 
 - xii, 287p.: ill., diagr., maps. 
<br/><br/> Bibliography: p. 265-276 
<br/><br/><label>ISBN: </label>071008871X