Tibetan Grammar. E-book. Formato EPUB H. A. Jaschke   -  Books On Demand, 2022  - 

The Tibetan Alphabet was adapted from the Lanc'a form of the Indian letters by T'on-mi-sam-bho-ta minister of king Sron-tsan-gam-po about the year 632. The Indian letters out of which the single Tibetan characters were formed are given in the following table in their Nagari shape.