Just some information I wanted to share on some good references I found for Western PA and Allegheny County, PA - found a few families in my history here. All searchable and downloadable as pdf:
https://archive.org/details/historyofalleghe1889cush
https://archive.org/details/genealogicalpers03jord
https://archive.org/details/genealogicalpers01injord
https://archive.org/details/genealogicalpers02injord