@misc{1163191, author = {J J Hsia and J C Richmond}, title = {Standard Reference Materials ::Preparation and calibration of standards of spectral specular reflectance/}, year = {1972}, month = {1972-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.SP.260-38}, language = {en}, }