Calculagraph (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Calculagraph" in English language version.

refsWebsite

Global rank English rank

800^th place

676^th place

1books.google.com

3^rd place

3^rd place

books.google.com (Global: 3^rd place; English: 3^rd place)

Robinson; De Witt Carl Eggleston; Frederick Bertrand Robinson (1921). Business costs; College of the city of New York series in commerce, civics and technology Series in commerce, civics and technology. University of California: D. Appleton and company. p. 250.

espacenet.com (Global: 800^th place; English: 676^th place)

worldwide.espacenet.com

US 583320, "Calculagraph", published 1897-05-25