539.772
T35

H371

Thoraeus, Robert A Study of the Ionization Method for Measuring the Intensity and Absorption of Roentgen Rays and of the Efficiency of Different Filters Used In Therapy / Robert Thoraeus. - Stockholm : F. Englunds Boktryckeri, 1932
88p.; ill. Includes bibliographical references * Roentgen - Rays * Standard Ionization Chamber *