IF you're still looking for her obit, it will probably be more like a death notice because of the cost for an obit to be run in a major city newspaper.
You can contact the Bronx Library, DeWitt Wallace Periodical Room, www.nyppl.org/locations/divisions/pericals-room
and ask if they'll scan it.
Another resource is the New York State Library who has nespapers on microlm. Successful Searching!