New York Zoological Society. "Photographs of building sites, animal ranges and scenery in South Bronx Park, prior to the development of the New York Zoological Park by the New York Zoological Society : negatives made in 1897, and presented to the society by Rudolph Kersting." Ephemera. 1897. Columbia Digital Library Collections [Columbia University Libraries]. Accessed 19 Apr 2024. https://dlc.library.columbia.edu/catalog/cul:76hdr7sqwf