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in creator/contributor: "Church, Wells L."  
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Primary view of Well-Drilling Apparatus.
Hughes, Howard R.
April 28, 1914
Primary view of Drill
Hughes, Howard R.
August 10, 1909
Primary view of Drill
Hughes, Howard R.
August 10, 1909
Primary view of Roller-Drill
Hughes, Howard Robard
November 28, 1911
Primary view of Roller-Drill
Hughes, Howard R.
May 31, 1910
Primary view of Roller Boring-Drill
Hughes, Howard Robard
December 27, 1910
Primary view of Roller-Drill
Hughes, Howard R.
May 24, 1910
Primary view of Boring Drill
Hughes, Howard R.
July 8, 1909
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