Part. i. The dielectric constant and electrical conductivity of gases & vapours ionized by x-rays at ultra-high radio frequency, Part. ii. Invetigations on the ultra-high frequency dielectric constant and electrical conductivity of ionized air in discharge tubes / [MS Thesis] Dielectric Electric conductivity 537.62 DIE Thesis (MS )-- Department of Physics, University of Dhaka,1983. Includes bibliographical references. Dhaka : University Of Dhaka, 1938. 1938. 1938 Text 99 p. : eng