01017nam a2200277Ia 4500 39979 BIBL 20160527200225.0 750310c19751967nyu bs 00010 eng 75002601 0405072228 n-us-pa EVLG 338.456 W228d c HD9517.P4 W3 1975 338.4/566/9141309748 338.456 W228d Walsh, William David 289265 Local The diffusion of technological change in the Pennsylvania pig iron industry, 1850-1870 William David Walsh. New York Arno Press 1975, c1967. xxi, 256 p. 24 cm. Dissertations in American economic history 87430 Local Originally presented as the author's thesis, Yale, 1967. Bibliography: p. 251-256. Iron industry and Trade Pennsylvania History. 116089 Local Technological innovations Pennsylvania Case studies. 177420 Local 30566 30566 0 0 0 338_456000000000000_W228D 0 evl 296116 10 10 1 2016-05-27 55139 0 338.456 W228d 80000000474588 2016-05-27 00:00:00 r:39979 z:NCC:D 6