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2by Doebrich, Jeff L.“...Metal for the ages...”
Published 2009
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7by Dalrymple, G. Brent“...Earth (Planet) Age....”
Published 1986
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10by Whitlow, Jesse W.“...Red iron-ore beds of Silurian age in northeastern Alabama, northwestern Georgia, and eastern...”
Published 1962
Government Document Map -
11by Newman, William L. (William Louis), 1920-2000“...Earth (Planet) Age....”
Published 1988
Government Document Book -
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19Published 1981“...Map and table showing radiometric ages of rocks in southwestern Alaska....”
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