00292nam a2200121Ia 4500020001400000082002000014100002600034245003900060260004800099300001300147500000500160700000500165  a674704207  a338.52bG858.PI  aGriliches, Zvi d ed.  aPrice indexes and quality changeb  aCambridgebCambridge University Pressc1971  ax, 287p.  a  a