Online Books by
Ellsworth R. Spencer
Books from the extended shelves:
- Spencer, Ellsworth R.: Effects of selected physical agents on the performance of acoustically absorptive materials (U.S. Dept. of the Interior, Bureau of Mines, 1990), also by J. Alton Burks and Thomas C. Ruhe (page images at HathiTrust)
- Spencer, Ellsworth R.: Evaluation of techniques for protecting dust sampling equipment in harsh environments (U.S. Dept. of Energy, 1996), also by Gerrit V. R. Goodman (page images at HathiTrust)
- Spencer, Ellsworth R.: Lightweight fiberglass feed leg for hand-held pneumatic percussion rock drills (U.S. Dept. of the Interior, Bureau of Mines, 1985) (page images at HathiTrust)
- Spencer, Ellsworth R.: Lightweight fiberglass feed leg for hand-held pneumatic percussion rock drills (U.S. Dept. of the Interior, Bureau of Mines, 1985) (page images at HathiTrust)
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