000 00322pam a2200145a 44500
082 _a621.384
_bH368e3
100 _aHellman, Charles I.
245 1 _aELEMENTS OF RADIO
250 _a3rd
260 _aPrinceton, N. J.
_bVan Nostrand
_c1956
300 _a354
650 _aRadio
964 _gCIRC
997 _a73373 s C
999 _c408868
_d408868