Inter-stellar Ethnology was a course taught at Starfleet Academy.
In 2285, the course instructor was Commander D. Gabrielle. The course and its instructor were listed on a directory placard located on the second level of a Starfleet Training Command building. (Star Trek II: The Wrath of Khan, set artwork)
This course was only mentioned in writing.
The placard was sold on It's A Wrap! sale and auction for US$31.99. [1](X)