Another useful volume is  Hemrāj Śākya's Nepāla-lipi-prakāśa (Kathmandu: Nepāla Rājakīya Prajñā
Pratiṣṭhāna, Vikram Saṃvat 2030 [=1974]).

The Hathi Trust record is here:
http://catalog.hathitrust.org/Record/007872735

good luck!

Matthew Kapstein
Directeur d'études,
Ecole Pratique des Hautes Etudes

Numata Visiting Professor of Buddhist Studies,
The University of Chicago

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