IYER, R. N. (2020). The Gupta Vidya: : the golden thread. Theosophy Trust Books.
Lua i Stíl Chicago (17ú heag.)IYER, Raghavan N. The Gupta Vidya: : The Golden Thread. Theosophy Trust Books, 2020.
Lua MLA (9ú heag.)IYER, Raghavan N. The Gupta Vidya: : The Golden Thread. Theosophy Trust Books, 2020.
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