anorganische und allgemeine Chemie 381 (3): 266. doi:10.1002/zaac.19713810305. U.S. Geological Survey – Thallium Extract from The Columbia Encyclopedia
207Tl トリウムCII(thorium CII) : 208Tl ラジウムCII(radium CII) : 210Tl [脚注の使い方] ^ Thallium Research from Department of Energy ^ Manual for reactor produced radioisotopes
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