000			00493nam a2200145Ia 4500
008			231217s9999 xx 000 0 und d
041			_aEnglish
082			_a621.382 ATK.2;1 `R'
100			_aAtkinson, J
245		0	_aTelephony V.2: Automatic exchange systems ( A detailed exposition of the telephone exchange& system of the British Post Office)
260			_c1950 _bLondon : Sir Isaac Pitman,
300			_axii+873
650			_aTelephony,V.2:,Automatic,exchange,systems
942			_cAA
999			_c168741 _d168741