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Cady, George H.; Hargreaves, George B. 306. Vapour pressures of some fluorides and oxyfluorides of molybdenum, tungsten, rhenium, and osmium. Journal of the Chemical Society (Resumed) (Royal Society of Chemistry (RSC)). 1961: 1568. ISSN 0368-1769. doi:10.1039/jr9610001568.