Ruff, P. M. (1990). Die erste deutsche vereinigte evangelische Protestant Kirche zu Pittsburgh, Pennsylvania: Then German Evangelical Protestant Church then Smithfield Congregational Church then Smithfield United Church of Christ : the baptismal register 1783-1811, historical notes, membership lists / by Paul Miller Ruff. [Aliquippa, PA: P.M. Ruff.

Ruff, Paul Miller. Die Erste Deutsche Vereinigte Evangelische Protestant Kirche Zu Pittsburgh, Pennsylvania: Then German Evangelical Protestant Church Then Smithfield Congregational Church Then Smithfield United Church of Christ : The Baptismal Register 1783-1811, Historical Notes, Membership Lists / By Paul Miller Ruff. [Aliquippa, PA: P.M. Ruff, 1990.

Ruff, Paul Miller. Die Erste Deutsche Vereinigte Evangelische Protestant Kirche Zu Pittsburgh, Pennsylvania: Then German Evangelical Protestant Church Then Smithfield Congregational Church Then Smithfield United Church of Christ : The Baptismal Register 1783-1811, Historical Notes, Membership Lists / By Paul Miller Ruff. [Aliquippa, PA: P.M. Ruff, 1990.