I am trying to find info about Great grandparents from Austria, any suggestions?

Question:

I am trying to find info about Great grandparents from Austria, any suggestions?

Best Answer - Chosen by Asker: I'd suggest you start by pulling their Declaration of Intent and Naturalization papers from the National Archives and Records Admin. Find out everything you can from American records, then contact Austrian officials to get their passport/visa information and civil registrations. It's a tedious process and little of the info you want/need is on the internet. But if you're consistent and persistent, you'll get the info on their hometown(s). Then it's a matter of searching civil registers and religious records to go back as far as written records will take you.