1970 Census Data: Indian Population by County in Various U.S. States1970-01-01unknownhttp://rightsstatements.org/vocab/NKC/1.0/enghttp://congressarchives.org/record/CAC_CC_001_4_131_17_0016The document lists various counties in Oklahoma and their respective populations according to the 1970 census. The data is organized by county and includes information on the Indian population in each county. The information is part of a report by the U.S. Department of Health, Education, and Welfare.