@misc{1163011, author = {Rosemond K Bell}, title = {Standard Reference Materials ::Methods for the chemical analysis of NBS copper-base spectrochemical standards/}, year = {1965}, month = {1965-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.SP.260-7}, language = {en}, }