Start in Hazleton at the local "PITZA" places... I'm too tired to Google for you, but one of 'em has been there since something like 1908. There is also a good one right where Hazleton abuts West Hazleton on the highway off the interstate, coming in from Wilkes-Barre... might be PA. 49.
Speaking of Wilkes-Barre, near there is Old Forge, which does pizza not in slices but in "cuts." This is a local phenomenon worth checking out.
Now, on the topic of pizzarias run by other than Italians (or Greeks), check out Hruniuk's Pizza & Subs in Mahanoy City. They'll make you a kielbasy pizza if you wanna. There's another such place in Shenandoah, but from my informant I'd say you start at Hruniuk's.
One thing you can try... most Internet sites are gonna send you to the chains. Blecch! Go to a town and ask the cops... they'll know where the good pizza is; they eat it! Tell 'em you're doing a paper... you're gonna end up with a plethora of information.
All I ask is that you let us here know of any real treasures you run across. I've only been through that area once, and that was many times too few.
Tiredly Pieing The Type As I Peck This Out, Ort. Carlton in Amazing Athens, Georgia.
P. S. Our oldest pizzaria here opened in the likes of 1959. It's no longer operating; it was run by a Greek fellow who went by the name of Steve Napoli (I think his name had been Napolopoulos).