Pennsylvania, Allegheny, Pittsburgh, Indeks File sa Kard sa Naturalisasyon, 1906-1990
Mokutlo Niini nga Koleksiyon
"Pennsylvania, Allegheny, Pittsburgh, Naturalization Card File Index, 1906-1990." Database. FamilySearch. https://FamilySearch.org : 16 September 2025. United States District Court, Pittsburg, PA.