Rate this link
|Uncertain Counts: The Struggle to Enumerate First Nations in Canada and the United States, 1870-1911|
Ethnohistory, Vol. 62, No. 4, October 2015, pp. 729-750.
Looks at reasons why Indian agents and national census takers often could not obtain accurate information, including: linguistic and cultural differences, distrust, uncertainty of racial categories, geographic mobility, and isolation of communities.