TY  - BOOK
AU  - Gordon Robert B and others
TI  - Toward a new iron age: Quantitative modeling of   
SN  - 0674898184
U1  - X9(F113):(B), M7 
PY  - 1987///
CY  - Cambridge
PB  - Harvard University Press        
KW  - Technological Industry
N1  - Bibliography P 163-68
ER  -