@book{fuks1840,
  address = {Kazan'},
  author  = {Fuks, A.},
  key     = {Fuks (1840)},
  title   = {Zapiski o chuvashah i cheremisah Kazanskoj gubemii (Notes on the Chuvash and Mari of the Kazanskaja Guberia)},
  year    = {1840}
}