United States. Naval Electronic Systems Command

• American national standard safety levels with respect to human exposure to radio frequency electromagnetic fields, 300 kHz to 100 GHz
• American national standard techniques and instrumentation for the measurement of potentially hazardous electromagnetic radiation at microwave frequencies
• Biological and human health effects of extremely low frequency electromagnetic fields
• Extremely low frequency (ELF) communications program in Wisconsin and Michigan
• Seafarer ELF communications system draft environmental impact statement for site selection and test operations