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An International Intercomparison of Fixed Points by Means of Sealed Cells in the Range 13.81 K–90.686 K, F Pavese, J Ancsin, D N Astrov, J Bonhoure, G Bonnier, G T Furukawa, R C Kemp, H Mass, R L Rusby, H Sakurai, Ling Shan-Kang
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Pavese et al. (1984) studied this question.
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