References for Size of the Universe

  1. S Clark, Towards the edge of the universe :A review of modern cosmology (Wiley, London, 1997).
  2. K Ferguson, Measuring the universe : The historical quest to quantify space (headline, London, 1999).
  3. J and M Gribbin, How far is up? (Icon Books, Cambridge, 2003.
  4. M Rowan-Robinson, The cosmological distance ladder (Freeman, San Francisco, 1985).