NA1 The period, size or frequency of the internal seiche in Okanagan, Skah

Name: The period, size or frequency of the internal seiche in Okanagan, Skah
Creator: University of British Columbia Okanagan
License: https://creativecommons.org/licenses/by/4.0/

What it contains, and where it is: The period, size or frequency of the internal seiche in Okanagan, Skaha or Osoyoos Lake. Nobody has published it; consultants hold unpublished measurements.

Nothing to link to. This one does not exist. Assume it, say where you used the assumption, and carry the uncertainty through.