"United States" . . "Census data"@en . . "Enumeration of undocumented aliens in the decennial census : hearing before the Subcommittee on Energy, Nuclear Proliferation, and Government Processes of the Committee on Governmental Affairs, United States Senate, Ninety-ninth Congress, first session, September 18, 1985"@en . . . . . "Enumeration of undocumented aliens in the decennial census hearing before the Subcommittee on Energy, Nuclear Proliferation, and Government Processes of the Committee on Governmental Affairs, United States Senate, Ninety-ninth Congress, first session, September 18, 1985"@en . . . . . . . . . . . "1980 - 1990" . .