The very best reference guides regarding interference as well as a plethora of topics are the ARRL publications. There is no way we can even come close to that wealth of knowlege and experience gathered from Amateurs and professionals over the last 100 years. Sorry guys but there's no sense in duplication which isn't even the right word for a poor attempt at perfection. Then again the leader of the pack has a callsign ending in RFI, rather appropriate, eh?
"Digital interfierence is going to get worse and worse."
Cut off your fingers, THOSE digits cause interference to more than radio receivers. (;->)
Sorry, somehow once again I just couldn't resist, so WHY do you guys keep FEEDING me?