2015BS ISO 8039:2014 Microscopes. Values, tolerances and symbols for magnification
2012BS ISO 8039:2012 Microscopes. Values, tolerances and symbols for magnification
1998BS 7012-1:1998 Light microscopes - Specification for the magnifying power of microscope imaging components
BS ISO 8039:2012 Microscopes. Values, tolerances and symbols for magnification has been changed from BS 7012-1:1998 Light microscopes - Specification for the magnifying power of microscope imaging components.