TY  - RPRT
TI  - A method for obtaining the parameters of electron-density profiles from topside ionograms 
AU  - St. Lawrence, Robert
PY  - 1965
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS TN 315
DO  - 10.6028/NBS.TN.315
ER  -