@misc{1154536, author = {Jack J Hsia and William H Venable Jr and Victor R Weidner}, title = {Optical radiation measurements::development of an NBS reference spectrophotometer for diffuse transmittance and reflectance}, year = {1976}, month = {1976-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.TN.594-11}, language = {en}, }