@misc{lewis1957,
  address      = {Hargeisa},
  author       = {Lewis, I. M.},
  howpublished = {Manuscript},
  key          = {Lewis (1957)},
  title        = {The Somali Lineage System and the Total Geneaology: A General Introduction to Basic Principles of Somali Political Institutions},
  year         = {1957}
}