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NIST, National Institute of Standards and Technology, U.S. Department of Commerce
NIST Temperature Scale Database (SRD 60), Version 3.0

ITS-90 References for Temperature Points:

Nitrogen-Substituted Hydrocarbons
Year Reference Data with Ref.
1996 Bedford, RE; Bonnier, G; Maas, H; Pavese, F, Recommended values of temperature on the International Temperature Scale of 1990 for a selected set of secondary reference points, Metrologia, 33 (1996) 133-154. (DOI:)
1985 Mangum B. W., El-Sabban, S., SRM 1970: Succinonitrile Triple -Point Standard-A Temperature Reference Standard Near 58.08 °C, J. Res. NBS 90, 259-370 (1985). (DOI:)
1982 Glicksman M. E., Voorhees P. W., The Triple-point Equilibria of Succinonitrile: Its Assessment as a Temperature Standard, in Temperature, Its Measurement and Control in Science and Industry (TMCSI), Reinhold, New York, 1982, 5, 321-326. (No DOI)
1970 Mangum B. W., SRM 1970: Succinonitrile Triple-Point Standard - and its Use in Calibration of Thermistors, In Temperature Measurement (Edited by L. Wang and S. Ling), Beijing, China Academic Publishers, 1986, 60-65. (No DOI)
1970 Mangum B. W., SRM 1970: Succinonitrile Triple-Point Standard - and its Use in Calibration of Thermistors, In Temperature Measurement (Edited by L. Wang and S. Ling), Beijing, China Academic Publishers, 1986, 60-65. (No DOI)