1
Published: 1969
Publisher: 地質調査所 / Chishitsu Chōsa sho
Superior document: Chiiki chishitsu kenkyū hōkōku : Akita (6) 78
2
Published: 1969
Superior document: Wakuya chiiki no chishitsu [Karte]
3
Published: 1969
Superior document: Wakuya chiiki no chishitsu [Textbd.]