000 00305nam a2200109Ia 4500
008 220201s1957 xx 000 0 eng d
100 _aI.S.I
245 0 _aIS 1033-1957 General requirments & tests for direct Radiator moving coil loudspeakers
260 _bI.S Insitute
_c1957
300 _a5
942 _2ddc
999 _c78688
_d78688