[1] APOD site: http://antwrp.gsfc.nasa.gov/apod/astropix.html
APOD site: http://antwrp.gsfc.nasa.gov/apod/ap020901.html
Also see page: http://antwrp.gsfc.nasa.gov/apod/ap000910.html

[2] "White Dwarfs…pin down cosmic age…date the Universe" Harvey Richer; articles in S&T and Astronomy magazines dated August 2002, referencing Harvey Richer team research with the Hubble Telescope

[3] Robert Jastrow; "Red Giants and White Dwarfs" by Robert Jastrow, Director, Goddard Institute for Space Studies, published 1967, Harper & Row

[3a] M. Coleman Miller, Professor of Astronomy, University of Maryland Web site for "White Dwarfs and Neutron Stars"

[3b] Web site http://hyperphysics.phy-astro.gsu.edu/HBASE/astro/whdwar.html "White Dwarfs and E...."

[4] Introductory Text; "Exploring the Dynamic Universe" by Theodore P Snow, West Publishing Co., printed 1995. Kilometers per second per Megaparsec, the 'Hubble Law' equation: {1/H, distance to remote galaxy/velocity as measured from red-shift, yields ~13.7 billion years}.

[5] Steven Weinberg; "The First Three Minutes", Professor of physics at Harvard University; (Professor of Physics at University of Texas in 1993), published by Basic Books of the Perseus Books Group. Copyright, 1977.

[6] Carl Sagan; "Cosmos", 1980, Random House publishers