TY  - BOOK
AU  - Delbru??ck,Hans
ED  - University of London
TI  - Numbers in history: how the Greeks defeated the Persians the Romans conquered the world the teutons overthrew the Roman empire and William the norman tack possession of England 
PY  - 1913///
CY  - Oxford
PB  - Clarendon Press
KW  - History
KW  - Military History
ER  -