TY  - BOOK
TI  - The builders: marvels of engineering 
AV  - TH 145 .B85 1992 
PY  - 1992///
CY  - Washington, D.C
PB  - National Geographic Society
KW  - ENGINEERING -- HISTORY
N1  - Includes index; Contents: Overcoming distance-- height and depth-- public spaces-- the need for protection-- responding to the spirit-- harnessing nature's power
ER  -