authoritative source reference missing from "unit of measure"

[ReesePlews]

the authoritative source reference is missing from the term "unit of measure".
https://isotc211.geolexica.org/concepts/483/
the authoritative source reference is [SOURCE: ISO 19116:2019, 3.29]
however since i was the editor of 19116 i will check this a bit more. there is a problem with the repository, it is not picking up that 19116 was the source and that is why there is no source in the online site.