Bludorf and Fosner
This website by the published authors Bludorf and Fosner, has some very interesting thoughts and observations concerning EM. I had the fortune of finding a book written by them in the public library: “Im Netz der Frequenzen - Elektromagnetische Strahlung, Gesundheit und Umwelt. Was man darüber wissen muss” (In the Frequency Network - Electricmagnetic radiation, Health, and Environment. What one should know about them.)
The pages are in German and English. Here’s the Link…