Ridker, R. G. (1967). Economic costs of air pollution: Studies in measurement. New York: Frederick A. Praeger.
Παραπομπή Chicago StyleRidker, Ronald G. Economic Costs of Air Pollution: Studies in Measurement. New York: Frederick A. Praeger, 1967.
Παραπομπή MLARidker, Ronald G. Economic Costs of Air Pollution: Studies in Measurement. New York: Frederick A. Praeger, 1967.
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