...85

Based on plates scanned with the MAMA microdensitometer at CAI, Paris and on observations collected at the European Southern Observatory, La Silla, Chile.

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...85

Tables 1 and 2 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/Abstract.html

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