BS DD IEC/TS 61994-2:2011 Piezoelectric, dielectric and electrostatic devices and associated materials for frequency control, selection and detection. Glossary. Piezoelectric and dielectric filters
2011BS DD IEC/TS 61994-2:2011 Piezoelectric, dielectric and electrostatic devices and associated materials for frequency control, selection and detection. Glossary. Piezoelectric and dielectric filters