For me the best overview is Russell Thornton's _American Indian Holocaust
and Survival_ Okla Press 1987.
You should also consult the following article which dissects the politics
of numbers with respect of this issue. I think the authors are too harsh
on Thornton, but they raise important and valid points.
Chapter I:
Stiffarm, Lenore A. with Lane, Phil Jr., "The Demography
of Native North America: A Question of American
Indian Survival." Pp. 23-53.
this is in:
Jaimes, M. Annette, ed. 1992. The State of Native
America: Genocide, Colonization, and Resistance.
Boston, MA: South End Press.
This article has references to lots of other sources.
Tom Hall
thall@depauw.edu
Department of Sociology
DePauw University
Greencastle, IN 46135
317-658-4519