Columbia subject headings:
Harvard subject headings:
Copper mines and mining--Japan--Ashio-machi.
Tanaka, Shōzō, 1841-1913.
Water--Pollution--Japan--Watarase River.
Princeton subject headings:
Copper mines and mining--Japan--Ashio-machi.
Tanaka, Shōzō, 1841-1913.
Water--Pollution--Japan--Watarase River.