000 00509 a2200265 4500
001 7545
020 _a
041 _aeng
080 _a621.31 Tea-1
245 _aElectro-technology : for national certificate students
250 _a
260 _aLondon
260 _bEnglish Universities Press
260 _c1947
300 _av.1
300 _c22 cm
490 _a
100 _aTeasdale, H.
700 _aWalton, E.C.
700 _a
650 _a
650 _a
942 _cBK
942 _2UDC
999 _c9157
_d9157