1950s-1990s Timeline of Philadelphia
^ philadelphia city archives . city of philadelphia. retrieved may 30, 2015. ^ miller 1983. ^ pennsylvania , official congressional directory, 1959 ^ robert l. harris jr.; rosalyn terborg-penn (2013). chronology . columbia guide african american history since 1939. columbia university press. isbn 978-0-231-51087-5. ^ timeline: local events national significance . civil rights in northern city: philadelphia. temple university. retrieved october 15, 2013. ^ sister cities . citizen diplomacy international - philadelphia. retrieved december 30, 2014. ^ 50 years of regional planning (timeline) . philadelphia: delaware valley regional planning commission. retrieved september 12, 2016. ^ shca . philadelphia: society hill civic association. retrieved october 2, 2013. ^ urban archives . temple university, libraries. retrieved may 30, 2015. ^ robin d. g. kelley , earl lewis, ed. (2005). chronology . make our world anew: his...