음극관 놀이 장치 (Korean Wikipedia)

Analysis of information sources in references of the Wikipedia article "음극관 놀이 장치" in Korean language version.

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about.com

classicgames.about.com

espacenet.com

worldwide.espacenet.com

  • US patent 2455992, Goldsmith Jr., Thomas T. & Mann, Estle Ray, "Cathode Ray Tube Amusement Device", issued 1948-12-14 

ieee.org

lexis.com

advance.lexis.com

web.archive.org

worldcat.org