Er ya yin de : fu biao jiao jing wen Index to Erh Ya - Hung, William 1893-1980 (Distributed by Chinese Materials and Research Aids Service Center, 1966)
"Ben bian Er ya jing wen yi min guo 15 nian (1926) Shanghai Jinzhang tu shu ju ying yin Qing Jiaqing 20 nian (1815) Nanchang fu xue chong kan shi san jing zhu shu fu jiao kan ji ben wei zhun". - Reprint. Originally published : Beijng : Yanjing University, 1941. - Series title on spine