1
2
Published: 1987
Superior document: Shizukuishi chiiki no chishitsu [Karte]
3
Published: 1987
Publisher: 地質調査所 / Chishitsu Chōsa sho
Superior document: Chiiki chishitsu kenkyū hōkōku : Akita (6) 14
4
Published: 1992
Publisher: 地質調査所 / Chishitsu-Chōsasho
Superior document: Tokushu chishitsuzu / Chishitsu-Chōsasho 21-5