TY - RPRT TI - Calibration of Cryogenic Resistance Thermometers between 0.65 K and 165 K on the International Temperature Scale of 1990 AU - Tew Jr., Weston L. PY - 2015 PB - National Institute of Standards and Technology SN - NIST SP 250-91 DO - 10.6028/NIST.SP.250-91 ER -