古今韵会举要

gǔ jīn yùn huì jǔ yàogujinyunhuijuyao

1. "Summary of the Collection of Rhymes Old and New", supplemented and annotated Yuan dynasty version of the no-longer-extant late Song or early Yuan "Collection of Rhymes Old and New" 古今韻會|古今韵会

Study it in Yanamino