Data for Protection Against Ionizing Radiation From External Sources: Supplement to ICRP Publication 15Data for Protection Against Ionizing Radiation From External Sources: Supplement to ICRP Publication 15. ICRP Publication 21. By the International Commission on Radiological Protection. Paper, $7.50. Pp.100, With Numerous Figures and Tables Elmsford, N.Y., Pergamon Press, 1973.
