This was originally a page that Lanica created to help keep track of what sources had been entered. Here is the original page.
It is biased toward the United States and more recent ancestors, but since it may be of use to some users it has been made available here.
To use this matrix, edit this page, copy the code and paste into your own page. Do not enter your own information here, this page should be kept generic so others may copy it as needed.