I copied a map from a microfilm at the National Archives that supposingly gave the Enumeration Districts. However when I went to look at the 1930 DC census the Enumeration District map that was on the microfilm had no correlation to the actual Enumeration Districts on the census. There is a microfilm that correlates addresses with Enumeration Districts. If you have a pretty good idea where the person lived you shouldn't have too much trouble finding them. Jack