TY  - BOOK
AU  - Walsh,William David
TI  - The diffusion of technological change in the Pennsylvania pig iron industry, 1850-1870
T2  - Dissertations in American economic history
SN  - 0405072228
AV  - HD9517.P4 W3 1975
U1  - 338.4/566/9141309748 
PY  - 1975///, c1967
CY  - New York
PB  - Arno Press
KW  - Iron industry and Trade
KW  - Pennsylvania
KW  - History
KW  - Local
KW  - Technological innovations
KW  - Case studies
N1  - Originally presented as the author's thesis, Yale, 1967; Bibliography: p. 251-256
ER  -