@misc{noauthor_subtract_2008,
	title = {Subtract with a {Canon} {Canola} 141 calculator},
	url = {http://www.youtube.com/watch?v=Z4hjWO3Q0Zo&feature=youtube_gdata_player},
	abstract = {This calculator has a nixie tube display and a delay line memory.
It is also curious how show the negative numbers as complementary numbers.
---
Esta calculadora tiene una pantalla de tubos nixie y una memoria de línea de retardo.
También es curioso como se muestran los números negativos: muestra el número complementario.},
	urldate = {2014-03-27},
	month = sep,
	year = {2008},
}

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