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Source:
p. 1, b. 1-39
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In A1 (→FE→EE) there is a cautionary 
before the d
1 minim. The absence of the sign in GE may mean that Chopin realised that it is superfluous here while writing [A2].
Compare the passage in the sources»
category imprint: Differences between sources
issues: Cautionary accidentals, Last key signature sign
notation: Pitch
Missing markers on sources:
A1, FE1, FED, GE1, GE2, EE1