How do I search for 1950 Census in Bronx, NY without a specific address?

I’m trying to find the 1950 Census for the Bronx, NY.  My grandparents lived there.  Harry H. and Miriam Levy.  I do not know where they lived, maybe near Morris Avenue.  I’m actually trying to get a death certificate for Miriam Levy, but I’m not sure of the year or place of death, although I do know it was in NY.  I really don’t know where to begin.