@article{113038,
      note = {Shows regional and sub-regional boundaries and offices of  the UN Observer Mission in El Salvador.},
      url = {http://digitallibrary.un.org/record/113038},
      title = {El Salvador [cartographic material].},
      publisher = {UN,},
      recid = {113038},
      pages = {1 map ;},
      address = {[New York] :. 1991-04},
      year = {1991},
      month = {Apr},
}