TY  - BOOK
ED  - National Geographic Society (U.S.)Special Publications Division 
TI  - Builders of the ancient world : : marvels of engineering 
SN  - 0870445901
AV  - TA 16 B85 1986
PY  - 1986///
CY  - Washington, D.C. 
PB  - : National Geographic Society 
KW  - Ingeniería
KW  - - Historia
KW  - Arquitectura antigua
N1  - Includes index
ER  -