TY  - BOOK
AU  - Al'pert, Y. L..
TI  - Radio wave propagation and the ionosphere
U1  - 621.38411 
PY  - 1963///
CY  - New York
PB  - Consultants Bureau Enterprises
KW  - Ionosphere
KW  - Radio-wave propagation
N1  - Dormitory:78735
ER  -