found: Work cat.: Bombies, c2001:container (unexploded cluster bombs; unexploded bombs in Laos)
found: USAF unexploded ordnance (UXO) recognition and reporting chart, 1999.
found: Unexploded ordnance, 1995:p. 1 (unexploded ordnance (UXO))
found: Defense Environmental Network & Info. Exchange WWW home page, May 5, 2004(UXO stands for Unexploded Ordnance; when a military munition does not function as intended ... they normally become unexploded ordnance or UXO)
found: UXB International, Inc. WWW home page, May 5, 2004(unexploded ordnance (UXO))
notfound: Bowyer, Richard. Dict. of military terms;Luttwak, Edward. Dict. of modern war, c1991;International military & defense enc., c1993