000			00550cam a22001571 4500
999			_c11632 _d11632
082			_aCir 621.38 W33 1951
100	1		_aWatson, Herbert M.
245	1	0	_aUnderstanding radio _ba guide to practical operation and theory _c[by] Herbert M. Watson, Herbert E. Welch [and] George S. Eby.
250			_a2nd ed.
260			_aNew York _bMcGraw-Hill Book Co., Inc. _cc1951.
300			_aix, 716 p. _billus. _c24 cm.
504			_aBibliography: p. 643-645. "List of visual materials": p. 695-701.
526			_a600-699
650		0	_aRadio.
942			_2ddc _cBK