Festungskrieg: I 61.649 
Geschichte 1660-1860 

Duffy, Christopher: Fire and stone. The 
science of fortress warfare 1660-1860. 
(I11ustr. [2. impr. J) -Newton Ab80t [usw. J: 
David & Char1es (1975). 207. S. 8 

Se1ect bib1iography S. 201-203.