Spring Pole Drilling

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Title: Spring Pole Drilling
Creators: Howells, Anthony
Issue Date: 1889-02-01
Citation: Ohio Mining Journal, no. 18 (February 1, 1889), 39-51.
Description: Item also includes a discussion of Howells' paper by various members of the Institute
URI: http://hdl.handle.net/1811/32582
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