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Glass, paints, varnishes and brushes: their history, manufacture, and use : Pittsburgh Plate Glass Company : Free Download, Borrow, and Streaming : Internet Archive
PPG Storefronts, 1923. Pittsburgh Plate Glass Co. From the Association for Preservation Technology (APT) - Building Technology Heritage Library, an online archive of period architectural trade catalogs. It contains thousands of catalogs. Select your material and become an architectural time traveler as you flip through the pages.