George Singer (fabricante de bicicletas) (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "George Singer (fabricante de bicicletas)" in Spanish language version.

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1speedreaders.info

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speedreaders.info

Kevin Atkinson (2013). The Singer Story: The Cars, Commercial Vehicles, Bicycles & Motorcycles. Veloce Publishing Ltd. Consultado el 14 de diciembre de 2013. «The curved front forks of a bicycle are a George Singer patent, and still in use today.»