TY  - BOOK
AU  - NATIONAL GEOGRAPHIC SOCIETY
TI  - BUILDERS OF THE ANCIENT WORLD / 
U1  - 624.09 
PY  - 1986///
CY  - [S.N] : 
PB  - NATIONAL GEOGRAPHIC SOCIETY ، 
KW  - ENGINEERING HISTORY
KW  - ARCHITECTURE, ANCIENT
ER  -