TY - RPRT TI - Standard Reference Materials : Infrared transmittance standards - SRMs 2053, 2054, 2055, and 2056/ AU - Hanssen, L M AU - Kaplan, S G PY - 2001 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST SP 260-123 DO - 10.6028/NIST.SP.260-123 ER -