Per Georg Scheutz (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Per Georg Scheutz" in English language version.

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6^th place

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136^th place

1books.google.com

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archive.org (Global: 6^th place; English: 6^th place)

Scheutz, George; Scheutz, Edward (1857). Specimens of Tables, Calculated, Stereomoulded, and Printed by Machinery. Whitnig. pp. Preface 8–12, 14–15, p. 3.
Swade, Doron (2002-10-29). The Difference Engine: Charles Babbage and the Quest to Build the First Computer. Penguin Books. pp. 4, 207. ISBN 9780142001448.

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

Watson, Ian (2012-05-17). The Universal Machine: From the Dawn of Computing to Digital Consciousness. Springer Science & Business Media. pp. 37–38. ISBN 978-3-642-28102-0.

psu.edu (Global: 207^th place; English: 136^th place)

citeseerx.ist.psu.edu

Merzbach, Uta C.; Zoology, Smithsonian Contributions To; Ripley, S. Dillon; Merzbach, Uta C. First Printing Calculator. pp. 8–9, 13, 25. CiteSeerX 10.1.1.639.3286.