Source:Ordinance-1957-267
From Pittsburgh Streets
"An ordinance changing the name of Diamond Street, between Stanwix Street and Forbes Street, to Forbes Avenue." Pittsburgh city ordinance, 1957, no. 267. Passed July 29, 1957; approved Aug. 2, 1957. Ordinance Book 61, p. 263. Reported in the Pittsburgh Sun-Telegraph, Aug. 10, 1957, p. 10 (Newspapers.com 524005035), and Aug. 12, p. 20 (Newspapers.com 524019331).