References

  • Dr. Musa Adam Abdul Jalil, (associate professor), Dept. of Sociology and Social Anthropology, University of Khartoum, Sudan.
  • Dr. Hassan M. Salih (professor), Dept. of Sociology and Social Anthropology, University of Khartoum, Sudan.
  • Abdul Ghaffar Mohamed Ahmed (professor), Dept. of Sociology and Social Anthropology, University of Khartoum, Sudan.