THIS REFERENCE CARRIES 173 JAW DROPPING REFERENCES ~ I would place this near the front of any research on Talisman related issues and in particular on Ethiopian structures, silver ring engravings, and other 7 stars related marks encountered across Islamic frontiers.
For the actual page full of research notes see
https://www.bing.com/search?q=ISLAMI...s=ds&form=QBRE
While the pinpoint research document by LLOYD Graham is
http://www.academia.edu/1999297/In_I...h_the_Pleiades