ID:DA17228397
Babcock, Earle Jay
Babcock, E. J. (Earle Jay), b. 1865
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by E. J. Babcock and W. W. Odell
Government Printing Office 1923 Bulletin / United States Department of the Interior, Bureau of Mines 221
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by E.J. Babcock
Govnt. Print. Off 1915 Bulletin / United States Department of the Interior, Bureau of Mines 89