000 002760000a22001210004500
245 _aElectronic inventions & discoveries
100 _aDummer, G.W.A.
250 _a2d ed.
260 _aOxford
_bPergamon
_c1978
080 _a621.38:608.1
_bD8
041 _aEN
942 _cBK
999 _c114415
_d114415