This primary source comes from the Records of the Environmental Protection Agency.
National Archives Identifier:
552708Full Citation: Walt Whitman Bridge crosses the Delaware River at South Philadelphia, leads to New Jersey suburbs; 09/1973; Records of the Environmental Protection Agency, Record Group 412. [Online Version, https://docsteach.org/documents/document/walt-whitman-bridge-crosses-the-delaware-river-at-south-philadelphia-leads-to-new-jersey-suburbs, January 22, 2025]