@misc{1184911, author = {B L Danielson}, title = {Measurement procedures for the optical beam splitter attenuation device BA-1:}, year = {1977}, month = {1977-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.IR.77-858}, language = {en}, }