Figure 5
is only available in electronic form at
http://www.edpsciences.org
Tables 2 and 3 are only available in electronic form at
the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5)
or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/413/233
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