deb ther sngon po (The Blue Annals) is a highly-regarded history of Tibetan Buddhist lineages and sectarian traditions. It is remarkable for its ecumenical perspective and comprehensiveness. Author, Gölo Zhönnupel ('gos lo gzhon nu dpal, 1392-1481) composed this work in only a few years, completing it in 1476 at age 84. (Jann Ronis 2004-07-16)