| LC control no. | sh 00006433
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| Topical subdivision | |
| Variant(s) | Radioisotopes
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| Scope note | Use 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.
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| Subject example tracing | Reference under the headings Isotopes; Radioisotopes; Stable isotopes; and the general see reference Isotopic forms of elements
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| Special note | Further subdivide by subdivisions used under chemicals.
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