Author(s): Karl Riley
Magnetic Sciences International HCR-2, Box 850-295 Tucson, AZ 85735 (800) 749-9873 (602) 822-2355
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Tracing EMFs in Building Wiring and Grounding by Karl Riley is a very good source to understand where and when simple (and somewhat common) wiring errors cause high-strength fields. –John Bower, The Healthy House Institut.