@book{soret1959,
  address   = {Paris},
  author    = {Soret, M.},
  key       = {Soret (1959)},
  publisher = {Paris: Presses Universitaire de France},
  series    = {Monographies ethnologiques africaines; Ethnographic survey of Africa, Western Africa, French series},
  title     = {Les Kongo nord-occidentaux},
  volume    = {7},
  year      = {1959}
}