50th anniversity of systematic studies by the federal Government of the Water Resources of the United States.
Summary
Album caption: 50th anniversity of systematic studies by the federal Government of the Water Resources of the United States by J.C. Hayt. Exhibition sheets.
Summary
Album caption: 50th anniversity of systematic studies by the federal Government of the Water Resources of the United States by J.C. Hayt.
Exhibition sheets.
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wsp00156.jpg
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wsp00156.tif
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