The title of the chapter in the Encyclopedia of Analytical Chemistry, John Wiley and Sons, United Kingdom, year 2000 is
Radon: Indoor and Remote Measurement Of.
I am the author.
The chapter is copyrighted.
The JWiley paid me $150.
The following is a previous version.
Actually, there are a lot of new updates and the Radon Professionals have a lot of info on them.