Here are some links that I used to use as the bookmarks in my browser. They are quite useful in research work. These days (January 2013) Google search will find what is needed so much more quickly, I do not access these anymore.
(note - for some it may require to activate scripting)
A phone book on line [USA] (there are others as well).
Northern Illinois University library system (Only for those who have a password).
Inception: 21 August 1998