California Digital Library
Online Archive of California: Carl r.roger's Collections
The Online Archive of California provides a very interesting website. Click on Biography, Important Dates in the right frame it will pull up information in left frame.
Other
Infed: Carl Rogers
Biography of Carl Rogers, which presents key texts and references to books about him.
C-SPAN
C Span American Writers: Will Rogers
Humorist Will Rogers is included as one of the writers whose works helped to change the society. Here's a biography, and links to other pages about Rogers.