Title: Gumma-ken kojoruishi no kenkyu, hoihen.
Authors: Yamazaki, Hajime, 1906-1990.
Publisher: Gunmakenbunkajigyōshinkōkai,
Year: 1979
Subjects: Castles Japan Gunma-ken.; Fortification Japan Gunma-ken.; Antiquities; Castles; Fortification; Gunma-ken (Japan) Antiquities.; Gunma-ken (Japan) History.; Japan Antiquities.; Japan; Japan Gunma-ken