TY  - BOOK
AU  - Rawer,K.
AU  - Katz,Ludwig
TI  - The ionosphere: its significance for geophysics and radio communications 
U1  - 551.5 
PY  - 1952///
CY  - London
PB  - Crosby Lockwood
KW  - Ionosphere
KW  - Atmosphere, Upper
KW  - Radio waves
KW  - Echo sounding
N1  - Includes index; Bibliographical references p. 191-198
ER  -