The Online Books Page

Books by Pittsburgh Energy Resource Center:

Books in the extended shelves:

• Pittsburgh Energy Resource Center: Analysis of trace elements in coal by spark-source mass spectrometry (U.S. Dept. of Interior, Bureau of Mines, 1973), also by T. Kessler, Robert A. Friedel, A. G. Sharkey, and United States Bureau of Mines (page images at HathiTrust)

Find more by Pittsburgh Energy Resource Center at your library, or elsewhere.