Arytmometr Odhnera (Polish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Arytmometr Odhnera" in Polish language version.

refsWebsite

Global rank Polish rank

2history-computer.com

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1rechenmaschinen-illustrated.com

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1johnwolff.id.au

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history-computer.com

Biografia Willgodta Odhnera [online], 8 lutego 2016 .
Frank Baldwin Biografia [online], 8 lutego 2016 .

johnwolff.id.au

JohnJ. Wolff JohnJ., John Wolff's Web Museum [online], 8 lutego 2016 .

rechenmaschinen-illustrated.com

TimoT. Leipälä TimoT., The Life and Works of W. T. Odhner (Part II) [online], 8 lutego 2016 .

xnumber.com

JamesJ. Redin JamesJ., A Brief History of Mechanical Calculators [online] .