Century of service: the first 100 years of the United States Department of Agriculture.

"Literature cited": p. 419-439.

1990 census of population and housing.

Chiefly tables.

1990 census of population and housing.

Chiefly tables.

1990 census of population and housing.

Chiefly tables.

1990 census of population and housing.

Chiefly tables.

1990 census of population and housing.

Chiefly tables.