00595nam a2200181Ia 4500003000900000008004100009020001800050040001600068080001500084100001700099245015200116260004800268300001400316490004200330650001400372650001400386650001300400IN-BaIIA211028s9999    xx            000 0 eng d  a0-521-56689-4  cIIA Library  a524.8bCOL  aColes, Peter 0aIs the universe open or closed?bthe density of matter in the universecPeter Coles and George Ellis                                                 aCambridgebCambridge University Pressc1997  axv, 236p.  aCambridge lecture notes in physics; 7  aAstronomy  aCosmology  aUniverse