References
- Hultberg, S. , Dahl, O. , Thoraeus, R. , Vikterlof, K. J. and Waltsam, R. (1959) Kilocurie cobalt 60 therapy at the Radiumhemmet. Acta radiol.
- Kennedy, R. J. , Wyckoff, H. O. and Snyder, W. A. (1950) Concrete as a protective barrier for gamma rays from cobalt-60. NBS J. Res., 44, p. 457.
- (1954) National Bureau of Standards Handbooks 54 and 55, Washington
- Sievert, R. M. (1933) On protection against radiation in teleradium treatment. Acta radiol., 14, p. 597.
- Thoraeus, R. (1959) Attenuation of roentgen radiation in lead at 70 to 1 400 kV.. Acta radiol., 51, p. 473.
- Wyckoff, H. O. and Kennedy, R. J. (1949) Concrete as a protective barrier for gamma rays from radium. NBS J. Res., 42, p. 431.
- Wyckoff, H. O. , Kennedy, R. J. and Bradford, W. R. (1948) Broad and narrow-beam attenuation of 500- to 1 400-kilovolt X-rays in lead and concrete. NBS J. Res., 41, p. 223.