To my knowledge, Triangles materials and A.A.B.’s books were introduced into Vietnam before 1975, via Mr. Ngo Thanh Ha, an Arcane School student and a late friend of mine. After that, due to social events, the books almost fell into oblivion until the 1980s when I received them from him by chance. In my first reading of the Triangles papers, especially the Triangles folder, I thought it should be used as a mode of simple service. Thus, its translation was made and circulated among my circle of friends, and later the English version and papers were used by certain new A.S. students.
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