* [https://www.sacred-texts.com/the/sd/index.htm Internet Sacred Text Archive] provides the text without diacritic marks.
* [https://www.sacred-texts.com/the/sd/index.htm Internet Sacred Text Archive] provides the text without diacritic marks.
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== Files ==
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[https://disk.yandex.ru/d/SYgQwJzb3SfiqS/Text/English/Theosophy/Blavatsky%20HP/Blavatsky%20HP%20-%20The%20Secret%20Doctrine Teopedia Storage] accumulates files with different editions of ''The Secret Doctrine'' and additional information, such as referenced books, articles about SD, etc.