Παραπομπή APA

(1990). Clean combustion of brown coal and lignite: Report on the results of and international research project. New York: United Nations.

Παραπομπή Chicago Style

Clean Combustion of Brown Coal and Lignite: Report On the Results of and International Research Project. New York: United Nations, 1990.

Παραπομπή MLA

Clean Combustion of Brown Coal and Lignite: Report On the Results of and International Research Project. New York: United Nations, 1990.

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