I was working through some readings suggested by Naresh Keerthi in
one of his posts to the list (thanks a lot for this, Naresh!). One of these (RP Das, “On the identification of a Vedic plant”) mentions an unpublished MA thesis submitted by
Mathias Helmdach to Uni München in 1980, “Farbbezeichnungen und Farbverständnis im altern Indien (Dargestellt an Hand ausgewählter Werke der altindischen Literatur)”. I am unable to locate it in the catalogue of the university (I thought, I could order a scan), so that I was wondering if any of you may know the whereabouts of the thesis, the scholar, or, what would be absolutely great, may even have a pdf of the study.