Patterson, C. P. (. P., & Hilgard, J. E. (. E. Chart of the Delaware River in front of the City of Philadelphia from Bridesburg to Fort Mifflin map, 1879.

Patterson, C. P. (Carlile Pollock), and J. E. (Julius Erasmus) Hilgard. Chart of the Delaware River in Front of the City of Philadelphia From Bridesburg to Fort Mifflin Map, 1879.

Patterson, C. P. (Carlile Pollock), and J. E. (Julius Erasmus) Hilgard. Chart of the Delaware River in Front of the City of Philadelphia From Bridesburg to Fort Mifflin Map, 1879.