TY  - BOOK
AU  - Davis, R.M.
ED  - United States.
ED  - United States.
TI  - The occurence of speed F and its effect on HF propagation
U1  - 551.5 
PY  - 1972///
CY  - Washington, D.C.
PB  - United States Department of Commerce
KW  - Atmospheric physics
KW  - Geography
N1  - OT/TRER 28
ER  -