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- [2] STANDARD IONIZATION-CHAMBER REQUIREMENTS FOR 250-KILOVOLT TO 500-KILOVOLT X-RAYS JOURNAL OF RESEARCH OF THE NATIONAL BUREAU OF STANDARDS, 1957, 58 (02): : 111 - 117
- [3] BROAD AND NARROW BEAM ATTENUATION OF 500-1400 KV X-RAYS IN LEAD AND CONCRETE NUCLEONICS, 1948, 3 (05): : 62 - 70
- [4] Data on the attenuation of narrow and broad beams of 1,000 kilovolt (peak) roentgen rays by lead, concrete and water AMERICAN JOURNAL OF ROENTGENOLOGY AND RADIUM THERAPY, 1944, 51 : 76 - 82