Hetzel, N. K. (1980). Environmental cooperation among industrialized countries: The role of regional organizations. University press of America.
শিকাগো স্টাইলে সাইটেশনHetzel, Nancy K. Environmental Cooperation Among Industrialized Countries: The Role of Regional Organizations. USA: University press of America, 1980.
এমএলএ সাইটেশনHetzel, Nancy K. Environmental Cooperation Among Industrialized Countries: The Role of Regional Organizations. University press of America, 1980.
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