TY  - RPRT
TI  - Analysis of ionospheric vertical soundings for electron density profile data. III, Procedures for obtaining monthly summary virtual height curves for N (h) analysis (composite virtual height curves) 
AU  - Wright, J W
PY  - 1962
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS TN 146
DO  - 10.6028/NBS.TN.146
ER  -