Version History for Open-File Report 00-160

By Tyler B. Coplen and Carol Kendall

Stable Hydrogen and Oxygen Isotope Ratios for Selected Sites of the U.S. Geological Survey's NASQAN and Benchmark Surface-water Networks
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Revised and reposted 9/15/14. The nbdata file was updated to correct the collection dates for 125 samples because it was discovered that the dates were erroneously recorded at the time of collection.