00917nam a2200241 i 450099100094148970753620020507104147.0951205s1990 at ||| | eng b1015128x-39ule_instLE00639484ExLDip.to Fisicaita53.9.786International atomic energy agency 12873Extension of the principles of radiation protection to sources of pot. exposure /IAEAVienna :IAEA,19901 v.Radiation protection.b1015128x21-09-0627-06-02991000941489707536LE006 53.9.786 IAE12006000055758le006-E0.00-l- 00000.i1018126x27-06-02Extension of the principles of radiation protection to sources of pot. exposure187739UNISALENTOle00601-01-95ma -engat 01