TY  - RPRT
TI  - Some applications of statistical sampling methods to outgoing letter mail characteristics 
AU  - Severo, Norman C
AU  - Zelen, Marvin
AU  - Newman, Arthur E
PY  - 1958
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS RPT 5773
DO  - 10.6028/NBS.RPT.5773
ER  -