. . "Isotopes radioactifs." . . . . . . . . . . . . . . . "Isotopes : [an account of how atoms and their radiations are used by man]" . . . . . . "Isotopes"@en . "Isotopes" . . . . . . . . . . . . . . . . . . . . . . . . . "Izotopy promieniotwórcze." . . "Isotopos." . . "Isotopos radioativos." . . "Isòtops." . . "Radioisotopos." . . "Isotop." . . "Anwendung." . . "Radioisotopes." . .