乐府诗集 yuèfǔshījí Collection of Yuefu Songs and Ballads
An influential 100-volume anthology of poetry compiled in the 11th century by [[郭茂倩|郭茂倩|guo1 mao4 qian4]]; it categorizes folk songs and literary imitations from the pre-Qin era through the Five Dynasties period into twelve categories, including court music and folk ballads.