@incollection{nadel1940,
  address   = {London},
  author    = {Nadel, S. F.},
  booktitle = {African Political Systems},
  editor    = {Fortes and Evans-Pritchard},
  key       = {Nadel (1940)},
  pages     = {165-195},
  title     = {The Kede},
  year      = {1940}
}