The publication from the U.S. Department of the Interior Bureau of Indian Affairs provides data on the Indian population and land in the United States as of June 30, 1962. It includes estimates of the population within and adjacent to each land unit, the principal tribe of residents, and the acreage of land in each unit. The 1960 Decennial Census was noted for its accuracy in counting Indians, and the total number of Indians in the United States was reported as 509,147. The Bureau obtains its population data from agency records, local enumerations, special surveys, and superintendent estimates. The publication aims to prevent misunderstanding by providing consistent and reliable data for public statements and information requests.