The use of plane ionization chambers in high energy elactron and pho ton beams : an international code of practice for dosimetry. - Vienna : International Atomic Energy Agency, 1993. - 121 p. : ill. ; 24 cm. - Technical report series; 381. . Includes bibliographical references. ISBN: 9201048963 ISSN: 0074-1914 Subjects--Topical Terms: Ionization chambers --Standards.------Radiation dosimetry --Standards.------Elactron beams.--------Photon beams.--------