Graphs as Groups
W. B. Vasantha Kandasamy & Florentin Smarandache
Proto-Indo-European Etymological Dictionary
Indo-European Language Revival Association
Encyclopedia of the Underground Railroad
J. Blaine Hudson
How Google Works
Eric Schmidt & Jonathan Rosenberg
Merriam-Webster's Collegiate Dictionary
Frederick C. Mish
Pegasus Bridge: June 6, 1944
Stephen E. Ambrose