ID:DA13308778
Perrott, George St. John
Perrott, G. St. J. (George St. John)
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by G.St.J. Perrott and N.A. Tolch
U.S. G. P. O. 1932 Bulletin / United States Department of Commerce, Bureau of Mines 349
by Osborn Monnett, G.St.J. Perrott and H.W. Clark
U.S. Government Printing Office 1926 Bulletin / Department of the Interior. Bureau of Mines 254
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