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Szabó Árpád - Chereji Iosif: I.F.A. - Cluj program of research on radionuclides abundance in Romanian environment. Institutul de fizică atomică. Bucureşti: Editura Academiei RPR, 1969, (Intreprinderea Poligrafică, IFA) 53 lap cu fig. şi graf., Szabó Árpád - Chereji Iosif: Abundance research of radioisotopes in mineral water of Crisana disctrict. Bucureşti: , 1967, 19 lap, 250 pld., Szabó A. - Bratu C. - Chereji I.: Recherches expérimentales concernant la détermination de l'usure des engrénages cylindriques non-corrigés en faite à l'aide des isotopes radioactifs. Academia RSR. IFA. Bucureşti: Institutul de fizică atomică, 1967, (Lit. tip. IFA) 17 lap, 250 pld., |