Range:
Subjects: Optical properties; Glass
Subjects: Antennas
Subjects: Electrical properties
Subjects: Iraq; Drinking water; Measurement
Subjects: Optical properties
Subjects: Iraq; Libraries; Lighting; Public buildings
Subjects: Electric conductors; Electrical properties
Subjects: Nuclear physics; Quantum theory
Subjects: Nuclear physics
Subjects: Electricity; Nuclear physics
Subjects: Astrophysics