Expand your research by checking out the Pennsylvania Online Historical Newspapers here.
The Historic Pittsburgh City Directory Collection can be searched across all its directories here.
Pennsylvania Business Directory, Ulman, 1854-5 - Free (Don's List)
Pennsylvania Business Directory, Ulman, 1854-5 - Free (Historic Pittsburgh)
Bradford and Olean City Directory, Lant, 1884-5 - Free (Prendergast Library)
- includes business directory for Bradford, Custer City, DeGolia, and Kendall