Rolf Alfred Stein, a Sinologist and Tibetologist, published a study of Linyi in 1947 entitled “Le Lin-yi, sa localisation, sa contribution à la formation du Champa et ses liens avec la Chine.”
I tried to find it recently to trace a footnote in a paper but could not locate a copy online. I then dug through some boxes I have in my house and found an ancient external hard drive which contained a scan I made of this text probably twenty years ago.
I had previously Xeroxed the text, and then I scanned it using a cheap scanner (ca. 2005). Looking at it now, it’s a pretty decent copy. You just need to rotate some of the pages.
For anyone interested, I’m uploading it here.