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- Language: English
- Year: 2013

- Author: Paolo Diego Bubbio, Philip Andrew Quadrio
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- Year: 2011

- Author: Jim Kanaris
- Language: English
- Year: 2013

- Author: Howard Murphet
- Language: English
- Year: 1975

- Author: Howard Murphet
- Language: English
- Year: 1975

- Author: Marilyn Ferguson
- Language: English
- Year: 1980

- Author: Henry Steel Olcott
- Language: English
- Year: 1875

- Author: Henry Steel Olcott
- Language: English
- Year: 1875

- Author: Gottfried de Purucker
- Language: English
- Year: 1996

- Author: Helena Blavatsky
- Language: English
- Year: 1889