TY - GEN AU - J R Baldwin AU - R Mavrodineanu C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1975-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.260-51 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1975 TI - Standard Reference Materials ::Glass filters as a standard reference material for spectrophotometry - selection, preparation, certification, use SRM 930/ ER -