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1LlyfrCyhoeddwyd 1989“...ASTM Committee E-14 on Mass Spectrometry...”
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2LlyfrCyhoeddwyd 1969“...ASTM Committee E-14 on Mass Spectrometry. Subcommittee IV on Data and Information Problems...”
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3Trafodyn Cynhadledd LlyfrCyhoeddwyd 1986“...ASTM Committee E-14 on Mass Spectrometry...”