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^ Cox, Harold (2004). "Senate Members 'S'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 19, 2020.
^ Cox, Harold (2004). "Senate Members 'H'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 19, 2020.
Cox, Harold (2004). "Senate Members 'D'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 19, 2020.
Cox, Harold (2004). "Senate Members 'L'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 19, 2020.
Cox, Harold (2004). "Senate Members 'E'". Pennsylvania Election Statistics: 1682–2004. Wilkes University Election Statistics Project. Retrieved February 19, 2020.