10.3886/ICPSR08664.v1 United States Department of Commerce. Bureau of the Census Inter-university Consortium for Political and Social Research 1987 census data demographic characteristics education energy consumption ethnicity housing income job history Native Americans occupations telephones work environment 1987-10-12 1992-02-16 1979 1980 survey data 8664 1 The 1980 American Indian supplementary file provides information on the American Indian, Eskimo, and Aleut populations beyond that obtained from the regular 1980 census questionnaire. The questionnaire was used on all federal and state reservations and in the historic areas of Oklahoma (excluding urbanized areas) to obtain information about the unique living conditions present on many reservations and in those specified areas of Oklahoma. Population items from the supplementary questionnaire include: tribal affiliation, educational attainment, health services received, occupation, work history, benefits received, and income. Housing items include: source of water, source of heat, kitchen facilities, telephone, electrical lighting, and materials and age of structure.