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In: http://hdl.handle.net/2027/mdp.39015078486290
At head of title: United States Department of the Interior . Bureau of Mines. ; Cover title. ; Mode of access: Internet.
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"This compilation is a complete revision and expansion of Technical paper 493, which was published in 1931."--Foreword. ; At head of title: United States Department of the Interior. Harold L. Ickes, secretary. Bureau of Mines. John W. Finch, director . ; Mode of access: Internet.
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In: http://hdl.handle.net/2027/mdp.39015086555516
"June, 1923." ; "Presented before the meeting of the American Chemical Society at Pittsburgh, Pa., September 6, 1922. Published in abstract form in Automotive Industries, January 4, 1923." -t.p. ; Includes bibliographical references. ; Mode of access: Internet.
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In: http://hdl.handle.net/2027/mdp.39015077559600
At head of title: U.S. Department of commerce. R.P. Lamont, secretary. Bureau of mines. Scott Turner, director. ; Mode of access: Internet.
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