TY  - BOOK
AU  - Bennington, T. W.
TI  - Shortwave radio and the ionosphere with special reference to everyday professional and amateur problems of shortwave transmission and reception
AV  - TK6553.B39 
PY  - 1950///
CY  - London
PB  - Iliffe and Sons Ltd
KW  - Radio, Short-wave
KW  - Electric waves
ER  -