Proceedings of the Engineers' Society of Western Pennsylvania 23
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb. Appended to v. 12 are 15 articles on "methods for the analysis of ores, &c.," 101 p Vols. 1-20, 1880-1904 Previous to 1895 the papers of each year were revised and made up into a separate volume of Transactions; with the publication of v. 10 the printing of the Transactions as an annual ceased SERBIB/SERLOC merged record
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