IS:2264-1963. Indian standard preferred frequencies for acoustical measurements.
Indian Standards Institution[ISI]
IS:2264-1963. Indian standard preferred frequencies for acoustical measurements. - New Delhi Indian Standards Institution 1972 - 4p.
ENG
IS CODE / I.S.I
IS:2264-1963. Indian standard preferred frequencies for acoustical measurements. - New Delhi Indian Standards Institution 1972 - 4p.
ENG
IS CODE / I.S.I