Analysis of information sources in references of the Wikipedia article "Townsend Duryea" in English language version.
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: CS1 maint: archived copy as title (link) citing "Encyclopedia of Nineteenth-Century Photography, Volume 1", by John Hannavy{{cite web}}
: CS1 maint: archived copy as title (link) Langdon's List of 19th & Early 20th Century Photographers{{cite web}}
: CS1 maint: archived copy as title (link) Langdon's List of 19th & Early 20th Century Photographers{{cite web}}
: CS1 maint: archived copy as title (link) citing "Encyclopedia of Nineteenth-Century Photography, Volume 1", by John Hannavy