TY - RPRT TI - Standard Reference Materials Technical specifications for certification of spectrophotometric NTRMs AU - Kramer, Gary W AU - Smith, Melody V AU - Travis, John C PY - 2000 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST SP 260-140 DO - 10.6028/NIST.SP.260-140 ER -