TY  - BOOK
T1  - The history of fortification /
DA  - c1981.
CY  - New York :
AU  - Hogg, Ian V.,
CN  - UG401
CN  - UG401
PB  - St. Martin's Press,
PP  - New York :
PY  - c1981.
N1  - Includes index.
ID  - 75709
KW  - Fortification
SN  - 0312378521
TI  - The history of fortification /
ER  -