PENNSYLVANIA FOOTBALL WRITERS All State

[D10D10]

Who exactly is "PENNSYLVANIA FOOTBALL WRITERS"
Does anyone have the full list of the people/newspapers that vote?
You see the choices every year but nowhere can I find out who is asked?
The Inquirer, Harrisburg Patriot News, Altoona Mirror, Citizen's Voice (Wilkae-Barre), Sranton Time Pittsburgh Post-Gazette may be a part.

Does anyone have a complete picture of who is polled and who tabulates the results?

Thanks