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http://www.ledsales.com.au/kits/nixie_supply.pdf
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http://chronotronix.com/sites/nixie/nixie-tubes.htm
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http://www.jsdesign.co.uk/nixotic
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http://www.ohararp.com/blog.html
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http://ww1.microchip.com/downloads/en/AppNotes/91053b.pdf
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http://www.daqq.eu/index.php?show=prj_plasma_nixie
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http://members.chello.nl/r.dekker49/flyback/flyback.html
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http://www.sample.co.kr/clock/index.html
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http://users.rcn.com/ted.johnson/ssbar.htm