TY  - BOOK
ED  - International Commission on Radiation Units and Measurements
TI  - Specification of high activity gamma-ray sources
AV  - QC793.5.G322 
U1  - 539.7222 INT 1970 
PY  - 1970///
CY  - Washington
PB  - ICRU
KW  - Gamma ray sources
KW  - Specifications
N1  - Includes index; Bibliography: p. 22
ER  -