@article{cummins1904,
  author  = {Cummins, S. L.},
  journal = {Jounr. Roy. Anth. Inst.},
  key     = {Cummins (1904)},
  pages   = {149-166},
  title   = {Sub-Tribes of the Bahr-el-Ghazal Dinka},
  volume  = {34},
  year    = {1904}
}