Pekka Siitoin founded the occult group called Turku Society for the Spiritual Sciences (Turun Hengentieteen Seura) on September 1, 1971.[1]
^Häkkinen, Perttu; Iitti, Vesa (2022). Lightbringers of the North: Secrets of the Occult Tradition of Finland. Simon and Schuster. ISBN 978-1-64411-464-3. p. 133