 Nalty , Bernard C. Air War Over South Vietnam : 1968 – 1975 . Washington DC : Air Force History and Museums Program , 2000 . 
 Nalty , Bernard C. Air War Over South Vietnam : 1968 – 1975 . Washington DC : Air Force History and Museums Program , 2000 . 
Nalty , Bernard C. Air War ova South Vietnam : 1968 – 1975 . Washington DC : Air Force History and Museums Program , 2000 .