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Determination of r-7,t-8,9,c-10-tetrahydroxy-7,8,9,10-tetrahydrobenzo[ a ]pyrene in human urine by gas chromatography-negative ion chemical ionization-mass spectrometry

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9, Results of Government Action and Legislation: What Other Government Action is Needed?

30, 1990, as amended by T.D TTB-146, 82 FR 1134, Jan

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