William T. Piper (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "William T. Piper" in English language version.

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  • Weber, Harry F. (1944). "William T. Piper, Senior, Leader in the Light-Airplane Industry". Pennsylvania History: A Journal of Mid-Atlantic Studies. 11 (3): 223–229. JSTOR 27766616.

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  • Myers, Spencer (24 June 2016). "Piper's Legacy". Pennsylvania Business Central. Retrieved 2019-02-11.

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