00293nam a2200109 a 450000500170000002000150001708200150003210000180004724500480006526000480011330000220016120251203110054.0  a0521467837  a523.1bPAD  aPadmanabhan,T  aCosmology and Astrophysics through Problems  aCambridgebCambridge University Pressc1996  axxv,486p.c23 cm.