| Organization | Website |
|---|---|
| Ancient Mystical Order Rosae Crucis (AMORC) | http://www.rosicrucian.org |
| Anthroposophical Society | http://www.anthrosophy.org |
| Builders of the Adytum | http://www.bota.org |
| The Theosophical Society | http://www.theosophical.org |
| Hermetic Order of the Golden Dawn | https://hermeticgoldendawn.org/ |
| Arcane School | https://www.lucistrust.org/arcane_school |
| Brotherhood of White Temple Church | http://www.bwtemple.org |
| Church Universal and Triumphant | http://www.tsl.org |
| Dolphin Star Mystery Temple School | http://www.amorahquanyin.com |
| I AM | http://www.saintgermainpress.com |
| Lemurian Fellowship | http://www.lemurianfellowship.org |
| Shambhala Center, or the International Institute for Melchizedek | www.shambhalatemple.com |
| Theosophical Society: International Headquarters | http://www.ts-adyar.org |
| Hollow Earth Resources at the Library of Congress | https://www.loc.gov/rr//scitech/SciRefGuides/hollowearth.html |
| College of the Siskiyous, Mount Shasta Collection | https://www.siskiyous.edu/library/shasta/ |
