Basics Year (Gregorian calendar) 508 Scholarship and Resources Scholarship Yuyama 1987 worldcat.org Metadata only , Eugêne Denis 1977 , Eugene Denis 1976 , Louis de la Vallee Poussin , Paul Mus 1939 , Paul Mus 1939 , Paul Mus 1939 , Dietz 1989b menadoc.bibliothek.uni-halle.de Scan encoded , Dietz 1989c jstor.org Scan encoded Restricted access , Walther Heissig 1988 Editions Kalpakam Sankaranarayanam, Kazunobu Matsudu and Motohiri Yoritami ain 2002