@article{186901,
      url = {http://digitallibrary.un.org/record/186901},
      title = {African statistical yearbook. 1990/91. Volume 2, Part 4,  Central Africa = Annuaire statistique pour l'Afrique.  1990/91. Volume 2, Partie 4, Afrique centrale.},
      publisher = {UN,},
      recid = {186901},
      pages = {1 v. (various pagings) :},
      address = {[Addis Ababa] :. 1992},
      year = {1992},
}