00502nam a2200181Ia 4500003000900000008004100009020001800050040001600068080001500084100002200099245003500121250001200156260004600168300001600214650004100230650002800271650002100299IN-BaIIA211028s9999    xx            000 0 eng d  a0-674-57503-2  cIIA Library  a524.6bBOK  aBok, Priscilla F. 4athe milky waycPriscilla F.Bok  a5th ed.  aCambridgebHarvard University Pressc1981  aviii, 356p.  aAstronomy and astrophysics thesaurus  aLocal group of galaxies  aMilky way galaxy