@misc{1166876, author = {Arthur E Newman}, title = {Distribution of outgoing first class lettermail at the Washington, D.C. Post Office:}, 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.RPT.6365}, language = {en}, }