Portney, P. R. (1984). Natural resources and the environment: The reagan approach. Washington, DC.: The Urban Institute Press.
Παραπομπή Chicago StylePortney, Paul R. Natural Resources and the Environment: The Reagan Approach. Washington, DC.: The Urban Institute Press, 1984.
Παραπομπή MLAPortney, Paul R. Natural Resources and the Environment: The Reagan Approach. Washington, DC.: The Urban Institute Press, 1984.
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