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LC control 00006433
Topical subdivision
Scope noteUse as a topical subdivision under individual elements and groups of elements for works discussing collectively the isotopic forms of those elements as well as for works on individual numbered isotopes of those elements.
Subject example tracingReference under the headings Isotopes; Radioisotopes; Stable isotopes; and the general see reference Isotopic forms of elements
Special noteFurther subdivide by subdivisions used under chemicals.