Keinhorst, J. (2003). Environmental-policy co-operation with central and eastern Europe.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKeinhorst, Jurgen. Environmental-policy Co-operation with Central and Eastern Europe. 2003.
एमएलए (9वां संस्करण) प्रशस्ति पत्रKeinhorst, Jurgen. Environmental-policy Co-operation with Central and Eastern Europe. 2003.
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