@misc{1157121, author = {Norman C Severo}, title = {Some applications of statistical sampling methods to outgoing letter mail characteristics:}, year = {1959}, month = {1959-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.TN.16}, language = {en}, }