Saṅs rgyas bstan pa'i chos 'byuṅ dris lan nor bu'i phreṅ ba a history of Buddhism in India and Tibet written in response to questions raised on the authenticity of the Rñiṅ-ma-pa tradition ; ed. from a rare ms. from the library of Chu-smad Snag-tshaṅ - mKhyen-rab-rgya-mtsho 'Dul-'dzin (National Library of Bhutan, 1984)