en.wikipedia.org
en.wikipedia.org
loc.gov
musicbytheyear.com
musicbytheyear.com
https://musicbytheyear.com › category › 1840-1849
loc.gov
en.wikipedia.org
wikiwand.com
en.wikipedia.org
acearchive.org
acearchive.org
https://acearchive.org › 1840-in-music
onthisday.com
wikiwand.com
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