亚历山大·格雷厄姆·贝尔 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "亚历山大·格雷厄姆·贝尔" in Chinese language version.

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books.google.com

Gray, Charlotte. Reluctant Genius: The Passionate Life and Inventive Mind of Alexander Graham Bell. New York: Arcade. 2006: 419. ISBN 1-55970-809-3.

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