TY  - BOOK
AU  - Layton Edwin T Ed.
TI  - Technology and social change in America
T2  - Interpretations of American History . Ed by John Highman and Bradford Perkins
U1  - Y0gF.73.N7, L3 
PY  - 1973///
CY  - New York
PB  - Harper & Row       
N1  - Bibliography : P 175-181
ER  -