Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "Croton Water System" The New York Public Library Digital Collections. http://digitalcollections.nypl.org/items/4bc11160-c5aa-012f-ca8b-58d385a7bc34
Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "Croton Water System" New York Public Library Digital Collections. Accessed May 22, 2019. http://digitalcollections.nypl.org/items/4bc11160-c5aa-012f-ca8b-58d385a7bc34
Lionel Pincus and Princess Firyal Map Division, The New York Public Library. Croton Water System Retrieved from http://digitalcollections.nypl.org/items/4bc11160-c5aa-012f-ca8b-58d385a7bc34
<ref name=NYPL>{{cite web | url=http://digitalcollections.nypl.org/items/4bc11160-c5aa-012f-ca8b-58d385a7bc34 | title=
Croton Water System }}
|author=Digital Collections, The New York Public Library |accessdate=May 22, 2019 |publisher=The New York Public Library, Astor, Lennox, and Tilden Foundation}}</ref>
![Plate II. Sketches of villages of the Croton watershed: Westchester County, pt. A [showing sketches of: Bedford Station, Cross River, Katonah, and Mt. Kisco]](https://images.nypl.org/index.php?id=5652833&t=b)
![Plate III : Sketches of villages of the Croton watershed: Westchester County, pt. B [showing sketches of: Somers, Golden's Bridge, Croton Falls, Purdys, South Salem, Salem Center, and North Salem]](https://images.nypl.org/index.php?id=5652834&t=b)
![Plate IV. Sketches of villages of the Croton watershed: Putnam County [showing sketches of: Patterson, Carmel, and Brewster]](https://images.nypl.org/index.php?id=5652835&t=b)
![Map of the hydrographical basin of the upper Mississippi River [bottom left].](https://images.nypl.org/index.php?id=ps_map_cd4_47&t=b)
