TY  - BOOK
AU  - Stewart,A.C.
AU  - Heffelfinger,J.B.
TI  - Effect of small frequency changes on the radiation patterns of MF (AM) directional antennas
U1  -  551.480973 
PY  - 1980///
CY  - [S.l.
PB  - s.n.]
KW  - Frequency curves
KW  - United States
KW  - Hydrology
ER  -