Title: Gu yin xi yan jiu
Description: Lun shu ku yin hsi ti fen chʻi, nei jung, tsʻai liao, fang fa, tʻiao chien chi shih chi wen tʻi teng. Chüan shou yu Lo Chʻang-pʻei, Chou Tso-jen, Shen Chien-shih, Chʻien Hsüan-tʻung chi chu che hsü.
Subjects: Chinese language, Phonology