Let me work on this one, I'll try to get it for you by Sunday.I'm fascinated by what you stated. I'd like to know more, especially the part about warnings before bombings. Could you give me a source? Thanks.
If you have the option, there is actually a good documentary on Amazon Prime Video channel, called Thud Pilots, its about F-105 bombers in Vietnam. Its pretty good, and even a few of them talk about ridiculous rules of engagement and target selection, plus warnings given to the enemy that made missions much more dangerous and less worthwhile.