000 00485 a2200265 4500
001 48502
020 _a
041 _aeng
080 _a621.38Sim
245 _aEffective audio-visual : a user's handbook
250 _a
260 _aLondon
260 _bFocal Press
260 _c1987
300 _a208 p.
300 _c24.5 cm
490 _a
100 _aSimpson, R.S.
700 _a
650 _a
650 _aElectronics
650 _a
942 _cBK
942 _2UDC
999 _c67007
_d67007