1
Published: 1975
Superior document: Iwanuma chiiki no chishitsu [Textbd.]
2
Published: 1975
Publisher: 地質調査所 / Chishitsu Chōsa sho
Superior document: Chiiki chishitsu kenkyū hōkōku : Akita (6) 108
3
Published: 1975
Superior document: Iwanuma chiiki no chishitsu [Karte]