Tsewang Norbu NGB by Cantwell, C, Mayer, R

“…Of the other surviving editions, our impression is that the Kathmandu manuscript is probably the most corrupt, sometimes a veritable jungle of scribal errors to the point of unusability; in addition, its pages are frequently broken and torn. However, the Nubri manuscript is said to be very similar to the wretchedly preserved Kathmandu manuscript, but in far better condition both physically and with regard to scribal accuracy. …”