Sōgi no kenkyū
By: Etō Yasusada cho
Publisher: Kazama Shobō
Published: 1967
Place of publication: Tōkyō
Language: jpn
Number of pages: 589
Notes: Sōgi hyakuin, Senku rengashū: p. [1]-419 (4th group).

Bibliography: p. 421-429 (4th group).