...1,

Present address: Department of Astronomy, The University of Texas at Austin, Austin, TX 78712, USA.

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...7,

Guest Observer, McDonald Observatory, University of Texas at Austin.

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...Å

We note that Munari & Zwitter (1997) incorrectly label the 5890 Å line as Na D1, and 5896 Å as Na D2. Their work is, however, internally consistent; Munari, priv. comm.

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