Index map of the survey of 1942 of the Delaware River from Philadelphia, PA to Bombay Hook, DE.PDFhttps://doi.org/doi:10.7282/T37S7SC9engPublicDelaware River- Philadelphia, Pa. to Bombay Hook, Del. - Index map - Survey of 1942MapsUnited States--Delaware RiverDelawareNew JerseyRutgers University-New Brunswick