Potentiometric surface of the upper Floridan aquifer in the St. Johns River Water Management District and vicinity, Florida, September 1985
George R. Schiner
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Eugene C. Hayes
D.M. Sumner
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G.G. Phelps
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R.M. Spechler
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L.A. Bradner
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L.C. Murray
A. M. O'Reilly
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L.A. Bradner
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Leel Knowles
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G.G. Phelps
George R. Schiner
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Eugene C. Hayes