@conference{125636, author = {Thomas Gentile and A Frenkel and Alan Migdall and Z Zhang}, title = {Neutral Density Filter Measurements at the National Institute of Standards and Technology, ed. by C. Burgess and D.G. Jones}, year = {1995}, month = {1995-06-01}, publisher = {Spectrophotometry, Luminescence and Colour; Science and Compliance , Rindge, NH}, language = {en}, }