Secret doctrines of the Tibetan books of the dead /
Lauf, Detlef Ingo.
Parkes, Graham.
Boulder London Shambhala London Distributed by Routledge and Kegan Paul
1977
Originally published: in German? Freiburg i. Br. : Arum Verlag, 1975
Bibliography: p.250-254
Bardo thödol