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Publication Extents

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A field method of spectrographic analysis for use in geochemical exploration work
Uteana Oda, A.T. Myers, E.F. Cooley
1959, Open-File Report 59-91
The method to be described is a modification of an earlier method of semiquantitative procedure. Through its use 34 elements can be determined simultaneously in one sample, which may be a rock, soil, mineral, or an ore. For many of these elements concentration ranges from one to ten thousand parts...
Floods in North and South Dakota: Frequency and magnitude
John A. McCabe, Orlo A. Crosby
1959, Open-File Report 59-80
The magnitude of a flood of a selected frequency for any point in the two states may be determined by methods outlined in this report, with two limitations. These methods are not applicable for regulated streams or for small-drainage areas (in general, less than 100 square miles). The determination of...