Columbia subject headings:
Harvard subject headings:
Economic development
Energy policy
Environmental policy
Eppler, Erhard, 1926---Interviews.
Paech, Niko--Interviews.
Politics, Practical
Renewable energy sources
Princeton subject headings:
Economic development.
Energy policy.
Environmental policy.
Eppler, Erhard, 1926-2019--Interviews.
Paech, Niko--Interviews.
Politics, Practical.
Renewable energy sources.