Irwin B. Laughlin (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Irwin B. Laughlin" in English language version.

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2books.google.com

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archive.org

A century and a half of Pittsburg and her people, Volume 4. Lewis Publishing Company. 1908. pp. 216–7.

books.google.com

Jordan, John W. (1978). Colonial and Revolutionary Families of Pennsylvania. Genealogical Publishing Com. pp. 834–7. ISBN 9780806352398.
Botero, Rodrigo (2001). Ambivalent embrace: America's troubled relations with Spain from the Revolutionary War to the Cold War. Greenwood Publishing Group. p. 106. ISBN 9780313315701.

nytimes.com

"Irwin Laughlin, 70, Ex-Envoy to Spain". The New York Times. 1941-04-19.

wisc.edu

images.library.wisc.edu

"Recognition by the United States of the provisional government of Spain" (PDF). Papers relating to the foreign relations of the United States, 1931, Vol. II. United States Department of State.