CHEMICAL FORMULAS + RADICALS + ISOTOPES (CHEMISTRY)
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BTGENERAL CHEMISTRY
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UDC54.02
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Descriptor GERCHEMISCHE FORMELN + RADIKALE + ISOTOPE (CHEMIE)
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Descriptor ENGCHEMICAL FORMULAS + RADICALS + ISOTOPES (CHEMISTRY)
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Descriptor FREFORMULES CHIMIQUES + RADICAUX + ISOTOPES (CHIMIE)
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NTCHEMICAL SYMBOLS + CHEMICAL FORMULAS + CHEMICAL SIGNS
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NTISOTOPES
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NTRADICALS (CHEMISTRY)