Ewers 1971

Ewers, John C. 1971. The Blackfeet: Raiders on The Northwestern Plains. Norman: University of Oklahoma Press.

https://archive.org/details/blackfeetraiders0000ewer

@book{ewers1971,
  address   = {Norman},
  author    = {Ewers, John C.},
  key       = {Ewers (1971)},
  publisher = {University of Oklahoma Press},
  title     = {The Blackfeet: Raiders on The Northwestern Plains},
  url       = {https://archive.org/details/blackfeetraiders0000ewer},
  year      = {1971}
}