Columbia subject headings:
Census undercounts--United States.
Household surveys--Response rate--United States.
United States--Census, 1990.
Harvard subject headings:
Census undercounts--United States.
Household surveys--Response rate--United States.
United States--Census, 1990.
Princeton subject headings:
Census undercounts--United States.
Household surveys--Response rate--United States.
United States--Census, 1990.