KS I ISO 8672-2021 Air quality — Determination of the number concentration of airborne inorganic fibres by phase contrast optical microscopy —Membrane filter method
2021KS I ISO 8672:2021 Air quality — Determination of the number concentration of airborne inorganic fibres by phase contrast optical microscopy —Membrane filter method
0000 KS I ISO 8672-2006(2017)
2006KS I ISO 8672:2006 Air quality-Determination of the number concentration of airborne inorganic fibres by phase contrast optical microscopy(Membrane filter method)