Columbia subject headings:
Blavatsky, H. P. (Helena Petrovna), 1831-1891. Secret doctrine.
Theosophy.
Harvard subject headings:
Blavatsky, H. P. (Helena Petrovna), 1831-1891. Secret doctrine.
Theosophy--Examinations, questions, etc.
Theosophy.
Princeton subject headings: