000 00467 a2200253 4500
001 146639
020 _a2
041 _aeng
080 _a621.396 Hel
245 _aElements of radio. 3rd ed.
250 _a
260 _a
260 _bVan Nostrand, New York,
260 _c1956
300 _ap.xiii, 354, illus., 23cm.,
300 _c
490 _a
100 _aHellman, C.I.\
700 _a
650 _a
650 _a
942 _cBK
942 _2UDC
999 _c107371
_d107371