books.google.com.co - During the last 30 years, there has been a remarkable devel opment and increase in the number of processes and devices that utilize or emit non-ionizing radiant energies such as micro waves, a form of electromagnetic wave energy and ultrasound representative of mechanical vibration. These energies are...https://books.google.com.co/books/about/Fundamental_and_Applied_Aspects_of_Nonio.html?id=bezTBwAAQBAJ&utm_source=gb-gplus-shareFundamental and Applied Aspects of Nonionizing Radiation
