000 003850000a22001090004500
027 _aBS 3238
_pPart I
_q1960
942 _cSD
110 _aBritish Standards Institution
245 _aB.S. 3238 : Pt. I : 1960 : Graphical symbols for components of servo-mechanisms : Pt. I - Transductors and magnetic amplifiers
260 _aLondon
_bBritish Standards Institution
_c1960
500 _aSTD1418
999 _c96782
_d96782