...avoidance''

Partly based on observations collected at the Observatoire de Haute-Provence (OHP), CNRS, France.

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...avoidance''^,

Table 2 is 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/Abstract.html

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