Columbia subject headings:
Harvard subject headings:
Ashio-shi (Japan)--History.
Conservationist--Japan--Biography.
Copper mines and mining--Environmental aspects--Japan--Ashio-shi--History.
Environmental policy--Japan--Watarase River Watershed--History.
Pollution--Japan--History.
Tanaka, Shōzō 1841-1913.
Watarase Water Shed (Japan)--History.
Yanaka-mura (Japan)--History.
Princeton subject headings:
Copper mines and mining--Environmental aspects--Japan--Ashio-machi--History--20th century.
Environmental policy--Japan--Watarase River Watershed--History--20th century.
Tanaka, Shōzō, 1841-1913.
Water--Pollution--Japan--Watarase River Watershed--History--20th century.