Quality of surface waters of the United States, 1950. Parts 7 and 8, lower Mississippi River Basin and western Gulf of Mexico basins
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1964 ◽
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Quality of surface waters of the United States, 1951. Parts 7 and 8, lower Mississippi River Basin and western Gulf of Mexico basins
1955 ◽
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1959 ◽
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1963 ◽
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1969 ◽
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1970 ◽
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1961 ◽
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1959 ◽
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1972 ◽
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1965 ◽
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