“Recommendations of the International Commission on Radiological Protection” (I.C.R.P. Publication 21—Data for protection against ionizing radiation from external sources: Supplement to I.C.R.P. Publication 15)

We wish to bring to the urgent attention of subscribers to your journal errors in Fig. 29 (page 70) and Fig. 31 (page 72) of the above publication. The right-hand scales are incorrectly aligned and should be ignored.