TY - CONF AU - Hanssen, Leonard AU - Kaplan, Simon C2 - Proceedings of Conference on Optical Spectrometry, Egham, UK DA - 1998-06-29 LA - en PB - Proceedings of Conference on Optical Spectrometry, Egham, UK PY - 1998 TI - Infrared Diffuse Reflectance Instrumentation and Standards at NIST ER -