Kismul, Hallgeir. 1989. People, Tree Planting And Forestry Extension Some Examples From Central Region. Fuelwood Development For Energy In Sudan, Field Document No. 35. Khartoum: Government of the Republic of Sudan. http://www.worldcat.org/oclc/65434273.

Furfey, Rosemary N. 1988. A Survey Of Women's Attitudes Toward Forestry And Fuelwood In Eight Rural Villages In Eastern Sudan. Field Document (Fuelwood Development For Energy In Sudan) No. 31. Khartoum, Sudan: Forests Administration. http://www.worldcat.org/oclc/29011350.