The Tibetan Book of the Great Liberation: Or, the Method of Realizing Nirvana Through Knowing the Mind, Preceded by an Epitome of Padma-Sambhava's Biography and Followed by Guru Phadampa Sangay's Teachings. According to English Renderings by Sardar Bahädur S. W. Laden La and by the Lāmas Karma Sumdhon Paul, Lobzang Mingyur Dorje, and Kazi Dawa-Samdup