TY - CONF AU - Thomas Gentile AU - A Frenkel AU - Alan Migdall AU - Z Zhang C2 - Spectrophotometry, Luminescence and Colour; Science and Compliance , Rindge, NH DA - 1995-06-01 LA - en PB - Spectrophotometry, Luminescence and Colour; Science and Compliance , Rindge, NH PY - 1995 TI - Neutral Density Filter Measurements at the National Institute of Standards and Technology, ed. by C. Burgess and D.G. Jones ER -