Columbia subject headings:
Harvard subject headings:
Communism and ecology--Russia, Northern.
Environmental policy--Russia, Northern.
Human ecology--Russia, Northern.
Nature--Effect of human beings on--Russia, Northern.
Russia, Northern--Environmental conditions.
Russia, Northern--Social conditions.
Princeton subject headings:
Human ecology--Russia, Northern.
Nature--Effect of human beings on--Russia, Northern.
Russia, Northern--Social conditions.