1980 census of population and housing.

"PHC80-2-49."

1980 census of population and housing.

"PHC80-2-75."

1980 census of population and housing.

"PHC80-2-132."

1980 census of population and housing.

"PHC80-2-18."

1980 census of population and housing.

"PHC80-2-21."

1980 census of population and housing.

"PHC80-2-29."

1980 census of population and housing.

"PHC80-2-88."

1980 census of population and housing.

"PHC80-2-118."

1980 census of population and housing.

"PHC80-2-133."

1980 census of population and housing.

"PHC80-2-195."

1990 census of population and housing.

"Issued July 1991."

1990 census of population and housing.

"Issued August 1991."

1990 census of population and housing.

"Issued August 1991."

1990 census of population and housing.

"Issued December 1992."

1990 census of population and housing.

"Issued January 1993."