DIN ISO 12858-1:2016-04 Optics and optical instruments - Ancillary devices for geodetic instruments - Part 1: Invar levelling staffs (ISO 12858-1:2014)
2016DIN ISO 12858-1:2016-04 Optics and optical instruments - Ancillary devices for geodetic instruments - Part 1: Invar levelling staffs (ISO 12858-1:2014)
2016DIN ISO 12858-1:2016 Optics and optical instruments - Ancillary devices for geodetic instruments - Part 1: Invar levelling staffs (ISO 12858-1:2014)