เพนแท็กซ์ (Thai Wikipedia)

Analysis of information sources in references of the Wikipedia article "เพนแท็กซ์" in Thai language version.

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hoya.co.jp

  • "HOYA and PENTAX Reach Basic Understanding for Management Integration" (PDF). Hoya. 2006-12-21. สืบค้นเมื่อ 2007-04-12.

pentax.co.jp

reuters.com

ricoh-imaging.co.jp

web.archive.org