I have only been to Ok. City one time to do research. That was when I first started and didn't know anything about genealogy.I didn't have very good luck there. I have been to a lot of libraries. Big ones like Dallas to small ones In little towns. But here I am going to brag a little about Tulsa Library. It is true that you only have 2 hours on the machines if it is busy. But the people are so nice and as helpful as can be. and they have a very good selection of things to look at. But as on person said , I have found more on the internet in the last couple of months that I have found in the last 20 years of research. Ona