TY  - BOOK
AU  - Piggott, W. R.
AU  - Rawer, K.
TI  - URSI HANDBOOK OF IONOGRAM INTERPRETATION AD REDUCTION
U1  - 538.761 
PY  - 1961///
CY  - Amsterdam
PB  - Elsevier Pub. Co.
KW  - Ionospheric Radio Wave Propagation -- Observations
KW  - Ionospheric Research
N1  - Reference Materials And Facilities
ER  -