A treatise dealing with elimination of obstacles (gegs sel), particularly during contemplative practies, Text acquired in Tibet by HRH Prince Peter of Greece and Denmark (1908-1980), Ritual text recovered by the ger ston rGod kyi ldem 'phru can, and Catalogue of Tibetan manuscripts and xylographs by Hartmut Buescher and Tarab Tulku. Copenhagen: Curzon – Det Kongelige Bibliotek, 2000. Vol. 2. p. 719