Profiles of Change by R.L. Polk & CoCall Number: HA730.N5 P769 1976
"These reports are compiled from a comparison of two door-to-door canvasses made to create the Newport News City Directory during the periods: March 24, 1975 to June 21, 1975 and May 17, 1976 to September 4, 1976. All current counts are taken from the canvass made May 17, 1976 to September 4, 1976."