新皮爾斯城堡 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "新皮爾斯城堡" in Chinese language version.

refsWebsite

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1books.google.com

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books.google.com

Stephen Turnbull. Crusader Castles of the Teutonic Knights (2): The stone castles of Latvia and Estonia 1185-1560. Osprey Publishing. : 60–. ISBN 978-1-84176-712-3.