@misc{1129811, author = {John R Sieber and Michael S Epstein and Antonio M Possolo}, title = {A retuned horwitz procedure for upgrading certificates of older standard reference materials:}, year = {2019}, month = {2019-05-01 04:05:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NIST.SP.260-198}, language = {en}, }