The Edge of Infinity. Supermassive Black Holes in the Universe
References
^ (2012). The Edge of Infinity. Supermassive Black Holes in the Universe, Cambridge U Press. ISBN 9780521814058 (revised May 2012)^ (2012). The Edge of Infinity. Supermassive Black Holes in the Universe, Cambridge U Press. ISBN 9780521814058 (revised May 2012)
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