http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f277-subject=Pittsburgh (Pa.) -- Commerce) https://catalog.wrhs.org/collections/search?docsPerPage%3D100;f277-subject%3DPittsburgh%20(Pa.)%20--%20Commerce Results for your query: docsPerPage=100;f277-subject=Pittsburgh (Pa.) -- Commerce Thu, 01 Jan 1970 12:00:00 GMT Pittsburgh district: the rise, progress and development of its manufactures, commerce, products, banking and educational facilities. Pennsylvania Trade Secretaries https://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc https://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT Pittsburgh and western Pennsylvania: their industries and commerce, resources and prospects. Chamber of Commerce (Pittsburgh, Pa.) https://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc https://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT Pittsburgh of to-day: a review of her phenomenal progress, incomparable industries and remarkable resources. Consolidated Illustrating Company https://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc https://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT