http://pec.lib.wvu.edu/record/P43931956-1962Shareholder news briefs.Serial. Printed Ephemera Collection has: v.4:no.2 (1956:July 31, v.5:no.1 (1957:May 31)-v.10:no.3 (1962:Nov.12).<br />Pittsburgh Plate Glass Company.Plate glass--Periodicals.Glass manufacture--United States--Periodicals.Pittsburgh Plate Glass Company--Periodicals.Chemical industry--United States--Periodicals.Glass trade--United States--Periodicals.Paint industry and trade--United States--Periodicals.14256