]'estungskrieg: Geschichte 1494-<:'")~, 
I 61.867 

DUffy, Christopher: Siege Warfare. LI11ustr., 
maps.J Vol. [l.J 2. -~ondon [usw.J: Houtledge 
& Kegan Paul t1979-e5 e O 

L1.] 
The .I!'ortress in the ear.ly modern worId 
1494-1660. 1979. XlI, 2e9 s. 

2. 
The Fortress in the age of Vauban and 
Frederick the Great 1660-1789. 1ge5. 
XV, 318 ;j.