Engan gyojō kankyō tekisei chōsa hōkokusho (Sado, Awashima engan kaiiki).
Series: Shin Sui Shi shiryō ;; 81-4
Publisher: Niigata-ken Suisan Shikenjō
Published: 1981
Place of publication: [Niigata]
Language: jpn
Number of pages: 275