References
- Attix, F. H. and De LaVergne, L. (1954) Plate separation requirements for standard free-air ionization chambers. Radiology, 63, p. 853.
- Smith, E. E. (1955) The standardization of X-ray dosemeters. Brit. J. Radiol, 28, p. 662.
- Wyckoff, H. O. and Aston, G. H. (1954) A comparison of X-ray standards. Acta radiol, p. 17.
- Wyckoff, H. O. and Smith, E. E. (1954) A comparison of X-ray standards. Brit. J. Radiol, 27, p. 325.