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6Published 1978“...The Survey,...”
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7Published 1958“...The Survey,...”
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8by Brown, Glen F. (Glen Francis), 1911-2001“...The Survey,...”
Published 1958
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9by Brown, Glen F. (Glen Francis), 1911-2001“...The Survey,...”
Published 1959
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13Published 1968“...[Geological Survey of Austria],...”
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14Published 1964“...U.S. Geological Survey,...”
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15Published 1956“...U.S. Geological Survey,...”
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16Published 1965“...Sudan Survey Department,...”
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17by Goudarzi, Gus H. (Gus Hossein), 1918-“...U.S. Geological Survey ; United Kingdom of Libya Ministries of National Economy, Petroleum Affairs...”
Published 1962
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