@misc{1186891, author = {P A Pella and E C Kuehner and W A Cassatt}, title = {Development of thin calibration standards for x-ray fluorescence analysis:}, 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.IR.75-970}, language = {en}, }