TY - RPRT TI - NIST calibration services for humidity measurement AU - Wexler, A AU - Hyland, R W AU - Hasegawa, S PY - 1991 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST IR 4677 DO - 10.6028/NIST.IR.4677 ER -