国音字典 (國音字典) guóyīn zìdiǎn

guóyīn zìdiǎn proper noun Guoyin Zidian / Dictionary of National Pronunciation
Domain: Language 语言 , Subdomain: China 中国 , Concept: Character Dictionary 字典
Notes: An early dictionary for standardized pronounciation, published in 1919 (Sun 2006, loc. 286)