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And also:
R.W. Potter II, J.L. Haas, Jr., "Models for calculating density and vapor pressure of geothermal brines", J. Res. U.S. Geol. Survey, 6(2), 1978, 247–257.
III. The equilibrium vapour pressure over a saturated salt solution at relatively low temperatures can also be indirectly accessed after the corresponding relative humidity data or correlation(s) fitted from such data. Reference papers follow:
A. Wexler, S. Hasegawa, "Relative humidity-temperature relationships of some saturated salt solutions in the temperature range 0º to 50º C", J. Res. Nat. Bur. Stand., 53(1), 1954, 19-26; DOI :10.6028/jres.053.003
J. F. Young, "Humidity control in the laboratory using salt solutions—a review", Journal of Applied Chemistry, 17(9) 1967, 241-245;Article Humidity Control in the Laboratory Using Salt Solutions—A Review
L. Greenspan, "Humidity fixed points of binary saturated aqueous solutions", J. Res. Nat. Bur. Stand. A, 81A(1), 1977; 89-96; DOI: 10.6028/jres.081a.011