Not sure if i'm posting on the right place, but i want to ask you a 1910~1950 map of New York city (i'm not asking for a mapmaking but for a historical map or something like that). On a web site, on a book, if u know tell me where i can find it.

The reason for this is because in the future (after i finish my fantasy map and novel) i want to write one about the mafia on New York (fictional not a true story) as i don't live there, and have never been there i need to about the places, streets from some years before.