...Major

Partly based on observations from the German-Spanish Astronomical Center, Calar Alto, operated by the Max-Planck-Institut für Astronomie, Heidelberg, jointly with the Spanish National Commission for Astronomy.

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...Major

Tables 4 to 6 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. Figure 7 is published electronically and is made available at http://www.ed-phys.fr/Abstract.html

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...SIMBAD

Set of Identifications, Measurements and Bibliography for Astronomical Data; operated by the Centre de Données astronomiques de Strasbourg.

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...NED

NASA/IPAC Extragalactic Database, operated by the Jet Propulsion Laboratory, California Institute of Technology under contract with the National Aeronautics and Space Administration.

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