TY  - GEN
AU  - Gies, Frances.
AU  - Gies, Joseph.
TI  - Cathedral, forge, and waterwheel:  :  technology and invention in the Middle Ages
SN  - 0060165901 (cloth) :
PY  - 1994///
CY  - nyu
PB  - HarperCollins Publishers
N1  - Frances & Joseph Gies
ER  -