TY  - BOOK
AU  - AL'PERT, Yakov L.
TI  - Radio wave propagation and the ionosphere
U1  - 621.384 11 A43R 
PY  - 1973///
PB  - N.Y.
KW  - IONOSPERIC RADIO WAVE PROPAGATION
KW  - LONOSPHERE
KW  - RADIO WAVES
ER  -