CensusCD 1960

"Includes data for 22,871 tracts from the urban parts of the country. The US Census Bureau did not fully tract the US until 1990 so there is only data available for the urban areas (or what was urban in 1960). Also included in this urban file is data for 175 SMSAs (Standard Metropolitan Statistical Areas or cities with their surrounding suburbs). The data is also included for the 175 Central Cities without their suburbs. There are 441 variables for each of these three geographies"--Publisher website.