Walsh, William David <br/><br/>
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 .
<br/><br/> Originally presented as the author's thesis, Yale, 1967. 
<br/><br/>Bibliography: p. 251-256. 
<br/><br/><label>ISBN: </label>0405072228 
<br/><br/><label>LCCN: </label>75002601  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Iron industry and Trade--History.--Pennsylvania<br/>Technological innovations--Case studies.--Pennsylvania
<br/><br/><label>LC Class. No.: </label>HD9517.P4  / W3 1975 
<br/><br/><label>Dewey Class. No.: </label>338.4/566/9141309748