포르토치카 (Korean Wikipedia)

Analysis of information sources in references of the Wikipedia article "포르토치카" in Korean language version.

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1books.google.com

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books.google.com

Martinot, Eric (1997). 《Investments to Improve the Energy Efficiency of Existing Residential Buildings in Countries of the Former Soviet Union》 1. print.판. Washington, DC: World Bank. 117쪽. ISBN 0-8213-4057-3. 2013년 2월 19일에 확인함.