00525nam a2200169Ia 4500003000900000008004100009020001800050040001600068080001600084100001900100245010400119260004800223300001300271650004100284650001400325650001600339IN-BaIIA211028s9999    xx            000 0 eng d  a0-521-29028-7  cIIA Library  a524.83bBER  aBerry, Michael 0aPrinciples of cosmology and gravitationcMichael Berry                                               aCambridgebCambridge University Pressc1976  ax, 179p.  aAstronomy and astrophysics thesaurus  aCosmology  aGravitation