http://en.wikipedia.org/wiki/List_of_U.S._state_name_etymologies
Bright, William (2004). Native American Placenames of the United States. Norman: University of Oklahoma Press.
Guyton, Kathy (2009) U.S. State Names: The Stories of How Our States Were Named (Nederland, Colorado: Mountain Storm Press)
Native American Loanwords in American English Ginny Carney Wicazo Sa Review Vol. 12, No. 1 (Spring, 1997), pp. 189-203
Published by: University of Minnesota Press Article Stable URL: http://www.jstor.org/stable/1409169