Samuel Hartlib (English Wikipedia)

Johnson, Mark S.; Stearns, Peter N. (1 September 2022). Education in World History. Taylor & Francis. ISBN 978-1-317-81337-8. More practically, Samuel Hartlib (c. 1600–1662), of German-Polish origin, but making his career in England, tirelessly promoted the idea of a "new education"..
M. M. Slaughter, Universal Languages and Scientific Taxonomy in the Seventeenth Century (2010), p. 232; Google Books.
Moss, Kay K. (1999). Southern Folk Medicine, 1750–1820. University of South Carolina Press. p. 224. ISBN 1-57003-289-0.

british-history.ac.uk (Global: 544^th place; English: 267^th place)

"Introduction | British History Online".

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The Hartlib Papers

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Greengrass, M. "Hartlib, Samuel". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/12500. (Subscription, Wikipedia Library access or UK public library membership required.)

en.wikisource.org (Global: 82^nd place; English: 41^st place)

Chisholm, Hugh, ed. (1911). "Hartlib, Samuel" . Encyclopædia Britannica (11th ed.). Cambridge University Press. We may assume that Chisholm relates to The Advice to Hartlib (1647); the other letter may have been the pamphlet on Double Writing (1648).
Chisholm, Hugh, ed. (1911). "Hartlib, Samuel" . Encyclopædia Britannica. Vol. 13 (11th ed.). Cambridge University Press. pp. 35–36.

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Three Foreigners, online text.

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The Galileo Project; M. Greengrass, "Hartlib, Samuel (c. 1600–1662)", Oxford Dictionary of National Biography (Oxford, UK: OUP, 2004) Retrieved 26 April 2016, pay-walled for date of death.
Greengrass, M. "Hartlib, Samuel". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/12500. (Subscription, Wikipedia Library access or UK public library membership required.)

rice.edu (Global: 3,744^th place; English: 2,530^th place)

galileo.rice.edu

The Galileo Project; M. Greengrass, "Hartlib, Samuel (c. 1600–1662)", Oxford Dictionary of National Biography (Oxford, UK: OUP, 2004) Retrieved 26 April 2016, pay-walled for date of death.

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The Hartlib Papers Project – University of Sheffield

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University of St Andrews. "HARTLIB, SAMUEL [SSNE 6617] - The Scotland, Scandinavia and Northern European Biographical Database". www.st-andrews.ac.uk. Retrieved 1 November 2022. ..son of George Hartlib, a Pole, and Elizabeth Langthon...His maternal grandfather John Langthon was a wealthy English merchant..

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Eine Vorgeschichte der Internet-Suchmaschine.

wikipedialibrary.wmflabs.org (Global: 524^th place; English: 218^th place)

Greengrass, M. "Hartlib, Samuel". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/12500. (Subscription, Wikipedia Library access or UK public library membership required.)

Samuel Hartlib (English Wikipedia)

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wikipedialibrary.wmflabs.org (Global: 524^th place; English: 218^th place)