Isaac Harris

• Harris' business directory of the cities of Pittsburgh & Allegheny
• Harris' general business directory of the cities of Pittsburgh and Allegheny
• Harris' Pittsburgh & Allegheny directory
• Harris's general business directory of the cities of Pittsburgh & Allegheny
• Harris' Pittsburgh & Allegheny directory, with the environs, &c. including the boroughs of Lawrenceville and Birmingham ... With a variety of interesting statistical notices ... of Pittsburgh and vicinity
• Harris' Pittsburgh business directory, for the year 1837