Braestrup, C. B. Basic protection requirements / by C. B. Breastrup and K.J. Vikte rlof. - Geneva : WHO , 1974. - 81 p. : ill. - Manual on radiation prtection in hospitals and general practice ; v.1. . Subjects--Topical Terms: Radiation --safety measures------ National Library of Medicine Call No.: WN 650 / M319r 1974 v.1