الفترة:
الموضوعات: الجسيمات؛ تحديد حجم الجسيمات
Subjects: Electric conductors; Particle size determination; Radiation; Silica; Urea
Subjects: Electron microscopes; Particle size determination; Plutonium; Thorium; Uranium
Subjects: Antibacterial agents; Particle size determination; X-rays