Appendix A and Tables A1 to A15 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
Visiting Astronomer,
Kitt Peak National Observatory, operated by
the Association of Universities for Research
in Astronomy, Inc. under contract with the National Science Foundation.