000			00417nam a2200181Ia 4500
005			20250619144710.0
008			250619s9999||||xx |||||||||||||| ||und||
020			_c9.98
040			_aMAIN
041			_aEnglish
082			_a621.384 _bRAD
245		0	_aRadio valve data
260			_aLondon _b; Iliffe Books _c, 1949
300			_a230p.
650			_aEngineering
650			_aRadio Engineering
942			_cBK
999			_c109837 _d109837